Xorg: xwayland: x.org x server: denial of service via integer underflow in xkb compatibility map handling
Priority LOW 36CWE-191Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 26 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-191 and the CVSS impact.
Summary
A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0038 32nd percentileScored 2026-11-07
Fix Partial Red Hat: 35 advisoriesRed Hat: 26 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | 24.1.5-6.el10_1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | 24.1.9-4.el10_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | 24.1.5-6.el10_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | — | 1.1.0-25.el6_10.16 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | 1.20.4-34.el7_9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | 1.8.0-36.el7_9.4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 21.1.3-20.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 1.20.11-28.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 1.15.0-9.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | 1.20.10-4.el8_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | 1.11.0-8.el8_4.15 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | 1.20.10-4.el8_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | 1.11.0-8.el8_4.15 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 21.1.3-2.el8_6.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 1.20.11-7.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 1.12.0-6.el8_6.17 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | 1.12.0-6.el8_6.17 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — | 21.1.3-2.el8_6.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — | 1.20.11-7.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | 21.1.3-2.el8_6.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | 1.20.11-7.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | 21.1.3-13.el8_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | 1.20.11-18.el8_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | 1.12.0-15.el8_8.17 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | 21.1.3-13.el8_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | 1.20.11-18.el8_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | 1.12.0-15.el8_8.17 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.15.0-6.el9_7.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 23.2.7-6.el9_7 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.20.11-33.el9_7 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.15.0-7.el9_8.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.20.11-34.el9_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 24.1.9-4.el9_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | 21.1.3-5.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | 1.20.11-13.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | 1.11.0-22.el9_0.17 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 21.1.3-10.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 1.20.11-20.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 1.12.0-14.el9_2.14 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 1.20.11-28.el9_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 22.1.9-8.el9_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 1.13.1-8.el9_4.9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | 1.20.11-33.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | 23.2.7-6.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | 1.14.1-10.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 24.1.5-6.el10_1 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 24.1.9-4.el10_2 Patch available CNA
- Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 24.1.5-6.el10_0 Patch available CNA
- Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION VendorRed Hat Affected — Fixed in 1.1.0-25.el6_10.16 Patch available CNA
- Red Hat Enterprise Linux 7 Extended Lifecycle Support VendorRed Hat Affected — Fixed in 1.20.4-34.el7_9 Patch available CNA
- Red Hat Enterprise Linux 7 Extended Lifecycle Support VendorRed Hat Affected — Fixed in 1.8.0-36.el7_9.4 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 21.1.3-20.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.20.11-28.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.15.0-9.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.20.10-4.el8_4 Patch available CNA
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.11.0-8.el8_4.15 Patch available CNA
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 1.20.10-4.el8_4 Patch available CNA
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 1.11.0-8.el8_4.15 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 21.1.3-2.el8_6.6 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.20.11-7.el8_6 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.12.0-6.el8_6.17 Patch available CNA
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 1.12.0-6.el8_6.17 Patch available CNA
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service VendorRed Hat Affected — Fixed in 21.1.3-2.el8_6.6 Patch available CNA
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service VendorRed Hat Affected — Fixed in 1.20.11-7.el8_6 Patch available CNA
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 21.1.3-2.el8_6.6 Patch available CNA
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.20.11-7.el8_6 Patch available CNA
- Red Hat Enterprise Linux 8.8 Telecommunications Update Service VendorRed Hat Affected — Fixed in 21.1.3-13.el8_8 Patch available CNA
- Red Hat Enterprise Linux 8.8 Telecommunications Update Service VendorRed Hat Affected — Fixed in 1.20.11-18.el8_8 Patch available CNA
- Red Hat Enterprise Linux 8.8 Telecommunications Update Service VendorRed Hat Affected — Fixed in 1.12.0-15.el8_8.17 Patch available CNA
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 21.1.3-13.el8_8 Patch available CNA
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.20.11-18.el8_8 Patch available CNA
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.12.0-15.el8_8.17 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.15.0-6.el9_7.1 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.2.7-6.el9_7 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.20.11-33.el9_7 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.15.0-7.el9_8.1 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.20.11-34.el9_8 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 24.1.9-4.el9_8 Patch available CNA
- Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 21.1.3-5.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.20.11-13.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.11.0-22.el9_0.17 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 21.1.3-10.el9_2 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.20.11-20.el9_2 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.12.0-14.el9_2.14 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 1.20.11-28.el9_4 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 22.1.9-8.el9_4 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 1.13.1-8.el9_4.9 Patch available CNA
- Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 1.20.11-33.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 23.2.7-6.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 1.14.1-10.el9_6 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 23
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux:10.1 | 10.1 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:10.2 | 10.2 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux_eus:10.0 | 10.0 | — | Red Hat |
| cpe:/o:redhat:rhel_els:6 | 6 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8::appstream | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8::crb | 8 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_eus_long_life:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.6::appstream | 8.6 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.1 Versions 10.1 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
- cpe:/o:redhat:enterprise_linux_eus:10.0 Versions 10.0 — ·Red Hat
- cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8::crb Versions 8 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_eus_long_life:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.6::appstream Versions 8.6 — ·Red Hat
Show 13 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:rhel_e4s:8.6::appstream | 8.6 | — | Red Hat |
| cpe:/a:redhat:rhel_tus:8.6::appstream | 8.6 | — | Red Hat |
| cpe:/a:redhat:rhel_eus_long_life:8.6::appstream | 8.6 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:8.8::appstream | 8.8 | — | Red Hat |
| cpe:/a:redhat:rhel_tus:8.8::appstream | 8.8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::crb | 9 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.0::appstream | 9.0 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.2::appstream | 9.2 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.4::appstream | 9.4 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.4::crb | 9.4 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.6::appstream | 9.6 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.6::crb | 9.6 | — | Red Hat |
- cpe:/a:redhat:rhel_e4s:8.6::appstream Versions 8.6 — ·Red Hat
- cpe:/a:redhat:rhel_tus:8.6::appstream Versions 8.6 — ·Red Hat
- cpe:/a:redhat:rhel_eus_long_life:8.6::appstream Versions 8.6 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:8.8::appstream Versions 8.8 — ·Red Hat
- cpe:/a:redhat:rhel_tus:8.8::appstream Versions 8.8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::crb Versions 9 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.0::appstream Versions 9.0 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.2::appstream Versions 9.2 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.4::appstream Versions 9.4 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.4::crb Versions 9.4 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.6::appstream Versions 9.6 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.6::crb Versions 9.6 — ·Red Hat
Remediation
Red Hat 35 advisories
- RHSA-2026:24341 Released 2026-06-08 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) tigervnc-1.12.0-6.el8_6.17, tigervnc-icons-1.12.0-6.el8_6.17, tigervnc-license-1.12.0-6.el8_6.17 +4
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) tigervnc-1.12.0-6.el8_6.17, tigervnc-icons-1.12.0-6.el8_6.17, tigervnc-license-1.12.0-6.el8_6.17 +4
- RHSA-2026:23496 Released 2026-06-04 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) tigervnc-1.1.0-25.el6_10.16, tigervnc-server-1.1.0-25.el6_10.16
- Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) tigervnc-server-applet-1.1.0-25.el6_10.16, tigervnc-server-module-1.1.0-25.el6_10.16
- RHSA-2026:23255 Released 2026-06-04 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) tigervnc-1.12.0-15.el8_8.17, tigervnc-icons-1.12.0-15.el8_8.17, tigervnc-license-1.12.0-15.el8_8.17 +4
- Red Hat Enterprise Linux AppStream TUS (v.8.8) tigervnc-1.12.0-15.el8_8.17, tigervnc-icons-1.12.0-15.el8_8.17, tigervnc-license-1.12.0-15.el8_8.17 +4
Show 32 more Red Hat advisories
- RHSA-2026:23254 Released 2026-06-04 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) tigervnc-1.11.0-8.el8_4.15, tigervnc-icons-1.11.0-8.el8_4.15, tigervnc-license-1.11.0-8.el8_4.15 +4
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) tigervnc-1.11.0-8.el8_4.15, tigervnc-icons-1.11.0-8.el8_4.15, tigervnc-license-1.11.0-8.el8_4.15 +4
- RHSA-2026:22456 Released 2026-06-02 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux Server (v. 7 ELS) tigervnc-1.8.0-36.el7_9.4, tigervnc-icons-1.8.0-36.el7_9.4, tigervnc-license-1.8.0-36.el7_9.4 +2
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) tigervnc-server-applet-1.8.0-36.el7_9.4, tigervnc-server-module-1.8.0-36.el7_9.4
- RHSA-2026:22424 Released 2026-06-02 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream EUS (v.9.6) tigervnc-1.14.1-10.el9_6, tigervnc-icons-1.14.1-10.el9_6, tigervnc-license-1.14.1-10.el9_6 +4
- RHSA-2026:21742 Released 2026-05-28 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) xorg-x11-server-1.20.11-18.el8_8, xorg-x11-server-Xdmx-1.20.11-18.el8_8, xorg-x11-server-Xephyr-1.20.11-18.el8_8 +4
- Red Hat Enterprise Linux AppStream TUS (v.8.8) xorg-x11-server-1.20.11-18.el8_8, xorg-x11-server-Xdmx-1.20.11-18.el8_8, xorg-x11-server-Xephyr-1.20.11-18.el8_8 +4
- RHSA-2026:21741 Released 2026-05-28 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) tigervnc-1.11.0-22.el9_0.17, tigervnc-icons-1.11.0-22.el9_0.17, tigervnc-license-1.11.0-22.el9_0.17 +4
- RHSA-2026:21718 Released 2026-05-28 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) xorg-x11-server-1.20.11-7.el8_6, xorg-x11-server-Xdmx-1.20.11-7.el8_6, xorg-x11-server-Xephyr-1.20.11-7.el8_6 +4
- Red Hat Enterprise Linux AppStream E4S (v.8.6) xorg-x11-server-1.20.11-7.el8_6, xorg-x11-server-Xdmx-1.20.11-7.el8_6, xorg-x11-server-Xephyr-1.20.11-7.el8_6 +4
- Red Hat Enterprise Linux AppStream TUS (v.8.6) xorg-x11-server-1.20.11-7.el8_6, xorg-x11-server-Xdmx-1.20.11-7.el8_6, xorg-x11-server-Xephyr-1.20.11-7.el8_6 +4
- RHSA-2026:21716 Released 2026-05-28 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) xorg-x11-server-Xwayland-21.1.3-2.el8_6.6
- Red Hat Enterprise Linux AppStream E4S (v.8.6) xorg-x11-server-Xwayland-21.1.3-2.el8_6.6
- Red Hat Enterprise Linux AppStream TUS (v.8.6) xorg-x11-server-Xwayland-21.1.3-2.el8_6.6
- RHSA-2026:21715 Released 2026-05-28 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) xorg-x11-server-1.20.10-4.el8_4, xorg-x11-server-Xdmx-1.20.10-4.el8_4, xorg-x11-server-Xephyr-1.20.10-4.el8_4 +5
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) xorg-x11-server-1.20.10-4.el8_4, xorg-x11-server-Xdmx-1.20.10-4.el8_4, xorg-x11-server-Xephyr-1.20.10-4.el8_4 +5
- RHSA-2026:21712 Released 2026-05-28 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) xorg-x11-server-Xwayland-21.1.3-13.el8_8
- Red Hat Enterprise Linux AppStream TUS (v.8.8) xorg-x11-server-Xwayland-21.1.3-13.el8_8
- RHSA-2026:21699 Released 2026-05-28 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) xorg-x11-server-1.20.11-13.el9_0, xorg-x11-server-Xdmx-1.20.11-13.el9_0, xorg-x11-server-Xephyr-1.20.11-13.el9_0 +4
- RHSA-2026:20555 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server security update
- Red Hat CodeReady Linux Builder EUS (v.9.4) xorg-x11-server-devel-1.20.11-28.el9_4, xorg-x11-server-source-1.20.11-28.el9_4
- Red Hat Enterprise Linux AppStream EUS (v.9.4) xorg-x11-server-1.20.11-28.el9_4, xorg-x11-server-Xdmx-1.20.11-28.el9_4, xorg-x11-server-Xephyr-1.20.11-28.el9_4 +4
- RHSA-2026:20576 Released 2026-05-26 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) tigervnc-1.12.0-14.el9_2.14, tigervnc-icons-1.12.0-14.el9_2.14, tigervnc-license-1.12.0-14.el9_2.14 +4
- RHSA-2026:20590 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux Server (v. 7 ELS) xorg-x11-server-1.20.4-34.el7_9, xorg-x11-server-Xephyr-1.20.4-34.el7_9, xorg-x11-server-Xorg-1.20.4-34.el7_9 +1
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) xorg-x11-server-Xdmx-1.20.4-34.el7_9, xorg-x11-server-Xnest-1.20.4-34.el7_9, xorg-x11-server-Xvfb-1.20.4-34.el7_9 +4
- RHSA-2026:20575 Released 2026-05-26 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) tigervnc-1.13.1-8.el9_4.9, tigervnc-icons-1.13.1-8.el9_4.9, tigervnc-license-1.13.1-8.el9_4.9 +4
- RHSA-2026:20558 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server security update
- Red Hat CodeReady Linux Builder EUS (v.9.6) xorg-x11-server-devel-1.20.11-33.el9_6, xorg-x11-server-source-1.20.11-33.el9_6
- Red Hat Enterprise Linux AppStream EUS (v.9.6) xorg-x11-server-1.20.11-33.el9_6, xorg-x11-server-Xdmx-1.20.11-33.el9_6, xorg-x11-server-Xephyr-1.20.11-33.el9_6 +4
- RHSA-2026:20561 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat CodeReady Linux Builder EUS (v.9.6) xorg-x11-server-Xwayland-23.2.7-6.el9_6, xorg-x11-server-Xwayland-devel-23.2.7-6.el9_6
- Red Hat Enterprise Linux AppStream EUS (v.9.6) xorg-x11-server-Xwayland-23.2.7-6.el9_6
- RHSA-2026:20563 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) xorg-x11-server-Xwayland-24.1.5-6.el10_0
- Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) xorg-x11-server-Xwayland-devel-24.1.5-6.el10_0
- RHSA-2026:20560 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) xorg-x11-server-Xwayland-22.1.9-8.el9_4
- RHSA-2026:20547 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) xorg-x11-server-Xwayland-21.1.3-10.el9_2
- RHSA-2026:20557 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) xorg-x11-server-1.20.11-20.el9_2, xorg-x11-server-Xdmx-1.20.11-20.el9_2, xorg-x11-server-Xephyr-1.20.11-20.el9_2 +4
- RHSA-2026:20562 Released 2026-05-26 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) xorg-x11-server-Xwayland-21.1.3-5.el9_0
- RHSA-2026:19342 Released 2026-05-19 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream (v. 9) tigervnc-1.15.0-7.el9_8.1, tigervnc-icons-1.15.0-7.el9_8.1, tigervnc-license-1.15.0-7.el9_8.1 +4
- RHSA-2026:19343 Released 2026-05-19 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-1.20.11-34.el9_8, xorg-x11-server-Xdmx-1.20.11-34.el9_8, xorg-x11-server-Xephyr-1.20.11-34.el9_8 +4
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) xorg-x11-server-devel-1.20.11-34.el9_8, xorg-x11-server-source-1.20.11-34.el9_8
- RHSA-2026:19344 Released 2026-05-19 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-Xwayland-24.1.9-4.el9_8
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) xorg-x11-server-Xwayland-24.1.9-4.el9_8, xorg-x11-server-Xwayland-devel-24.1.9-4.el9_8
- RHSA-2026:19125 Released 2026-05-19 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 10) xorg-x11-server-Xwayland-24.1.9-4.el10_2
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) xorg-x11-server-Xwayland-devel-24.1.9-4.el10_2
- RHSA-2026:13414 Released 2026-05-04 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream (v. 8) tigervnc-1.15.0-9.el8_10, tigervnc-icons-1.15.0-9.el8_10, tigervnc-license-1.15.0-9.el8_10 +4
- RHSA-2026:11692 Released 2026-04-29 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream (v. 8) xorg-x11-server-1.20.11-28.el8_10, xorg-x11-server-Xdmx-1.20.11-28.el8_10, xorg-x11-server-Xephyr-1.20.11-28.el8_10 +4
- Red Hat Enterprise Linux CRB (v. 8) xorg-x11-server-devel-1.20.11-28.el8_10, xorg-x11-server-source-1.20.11-28.el8_10
- RHSA-2026:11656 Released 2026-04-29 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 8) xorg-x11-server-Xwayland-21.1.3-20.el8_10
- RHSA-2026:11388 Released 2026-04-28 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-1.20.11-33.el9_7, xorg-x11-server-Xdmx-1.20.11-33.el9_7, xorg-x11-server-Xephyr-1.20.11-33.el9_7 +4
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) xorg-x11-server-devel-1.20.11-33.el9_7, xorg-x11-server-source-1.20.11-33.el9_7
- RHSA-2026:11369 Released 2026-04-28 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-Xwayland-23.2.7-6.el9_7
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) xorg-x11-server-Xwayland-23.2.7-6.el9_7, xorg-x11-server-Xwayland-devel-23.2.7-6.el9_7
- RHSA-2026:11352 Released 2026-04-28 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 10) xorg-x11-server-Xwayland-24.1.5-6.el10_1
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) xorg-x11-server-Xwayland-devel-24.1.5-6.el10_1
- RHSA-2026:10739 Released 2026-04-27 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream (v. 9) tigervnc-1.15.0-6.el9_7.1, tigervnc-icons-1.15.0-6.el9_7.1, tigervnc-license-1.15.0-6.el9_7.1 +4
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:10739
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:11352
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
Show 9 more groups
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:11369
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:11388
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:11656
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:11692
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:13414
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:19125
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:19342
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:19343
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
- Advisory ·
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and 17 more products — RHSA-2026:19344
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-26342 Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory accessPriority LOW 36
- TI-2026-26340 Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruptionPriority LOW 36
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder EUS (v.9.4) | Fixed | RHSA-2026:20555 |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2026:20558, RHSA-2026:20561 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:11352, RHSA-2026:19125 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:11656, RHSA-2026:11692, RHSA-2026:13414 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:10739, RHSA-2026:11369, RHSA-2026:11388, RHSA-2026:19342, RHSA-2026:19343, RHSA-2026:19344 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2026:21715, RHSA-2026:23254 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2026:21716, RHSA-2026:21718, RHSA-2026:24341 |
| Red Hat Enterprise Linux AppStream E4S (v.8.6) | Fixed | RHSA-2026:21716, RHSA-2026:21718 |
| Red Hat Enterprise Linux AppStream E4S (v.8.8) | Fixed | RHSA-2026:21712, RHSA-2026:21742, RHSA-2026:23255 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2026:20562, RHSA-2026:21699, RHSA-2026:21741 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:20547, RHSA-2026:20557, RHSA-2026:20576 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:20563 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2026:20555, RHSA-2026:20560, RHSA-2026:20575 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:20558, RHSA-2026:20561, RHSA-2026:22424 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:21715, RHSA-2026:23254 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:24341 |
| Red Hat Enterprise Linux AppStream TUS (v.8.6) | Fixed | RHSA-2026:21716, RHSA-2026:21718 |
| Red Hat Enterprise Linux AppStream TUS (v.8.8) | Fixed | RHSA-2026:21712, RHSA-2026:21742, RHSA-2026:23255 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:11692 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:11352, RHSA-2026:19125 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:11369, RHSA-2026:11388, RHSA-2026:19343, RHSA-2026:19344 |
| Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) | Fixed | RHSA-2026:20563 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2026:20590, RHSA-2026:22456 |
| Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) | Fixed | RHSA-2026:23496 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2026:20590, RHSA-2026:22456 |
| Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) | Fixed | RHSA-2026:23496 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33999
- 2026-10-03 Alias added: GHSA-g562-3mh5-27v6
References
Advisory 35
- RHSA-2026:10739
- RHSA-2026:11352
- RHSA-2026:11369
- RHSA-2026:11388
- RHSA-2026:11656
- RHSA-2026:11692
- RHSA-2026:13414
- RHSA-2026:19125
- RHSA-2026:19342
- RHSA-2026:19343
- RHSA-2026:19344
- RHSA-2026:20547
- RHSA-2026:20555
- RHSA-2026:20557
- RHSA-2026:20558
- RHSA-2026:20560
- RHSA-2026:20561
- RHSA-2026:20562
- RHSA-2026:20563
- RHSA-2026:20575
- RHSA-2026:20576
- RHSA-2026:20590
- RHSA-2026:21699
- RHSA-2026:21712
- RHSA-2026:21715
- RHSA-2026:21716
- RHSA-2026:21718
- RHSA-2026:21741
- RHSA-2026:21742
- RHSA-2026:22424
- RHSA-2026:22456
- RHSA-2026:23254
- RHSA-2026:23255
- RHSA-2026:23496
- RHSA-2026:24341
More Red Hat vulnerabilities
- TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
- TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-33999 · CVE Program
- CVE-2026-33999 · NVD
- FIRST EPSS
- GHSA-g562-3mh5-27v6 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-33999 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences