Out-of-bounds read in Red Hat Enterprise Linux 10.0 Extended Update Support
Priority MEDIUM 40CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 21 fixed, 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00489 42nd percentileScored 2026-11-07
Fix Partial Red Hat: 25 advisoriesRed Hat: 21 fixed, 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 10.0 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 8.4 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 | — | 1.15.0-7.el9_8.1 | 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 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | 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 8.4 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 1.15.0-7.el9_8.1 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 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:x.org:x_server:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | x.org |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Red Hat |
- cpe:2.3:a:x.org:x_server:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·x.org
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Red Hat
Remediation
Red Hat 25 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 22 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
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| 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. 9) | Fixed | RHSA-2026:19342 |
| 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 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-2026-34000
- 2026-10-03 Alias added: GHSA-x7p4-8jjf-qcp4
References
Advisory 27
- RHSA-2026:19342
- 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
- https://access.redhat.com/security/cve/CVE-2026-34000
- RHBZ#2451107
More Red Hat Enterprise Linux vulnerabilities
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
Sources
- CVE-2026-34000 · CVE Program
- CVE-2026-34000 · NVD
- FIRST EPSS
- GHSA-x7p4-8jjf-qcp4 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-34000 · 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