Xorg-x11-server: tigervnc: heap-based buffer overflow privilege escalation vulnerability
Priority LOW 38CWE-122Published · 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: 21 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.
Summary
A flaw was found in the X.org server. Due to improperly tracked allocation size in _XkbSetCompatMap, a local attacker may be able to trigger a buffer overflow condition via a specially crafted payload, leading to denial of service or local privilege escalation in distributions where the X.org server is run with root privileges.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00903 59th percentileScored 2026-11-07
Fix Partial xorg-server: 21.1.14Red Hat: 15 advisoriesRed Hat: 21 fixed, 2 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 |
|---|---|---|---|---|---|
| — | xorg-server | 1.1.1 to before 21.1.14 | 21.1.14 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | 24.1.5-3.el10_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | — | 1.1.0-25.el6_10.13 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | 1.8.0-34.el7_9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 1.20.11-25.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 21.1.3-17.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 1.13.1-14.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | — | 1.9.0-15.el8_2.12 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | 1.11.0-8.el8_4.11 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Telecommunications Update Service | — | 1.11.0-8.el8_4.11 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | — | 1.11.0-8.el8_4.11 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 1.12.0-6.el8_6.12 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — | 1.12.0-6.el8_6.12 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | 1.12.0-6.el8_6.12 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | — | 1.12.0-15.el8_8.11 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.14.1-1.el9_5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.20.11-28.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 23.2.7-3.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | 1.11.0-22.el9_0.12 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | 1.12.0-14.el9_2.9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 1.13.1-8.el9_4.4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
- xorg-server Vendor— Affected 1.1.1 to before 21.1.14 Fixed in 21.1.14 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 24.1.5-3.el10_0 Patch available CNA
- Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION VendorRed Hat Affected — Fixed in 1.1.0-25.el6_10.13 Patch available CNA
- Red Hat Enterprise Linux 7 Extended Lifecycle Support VendorRed Hat Affected — Fixed in 1.8.0-34.el7_9 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.20.11-25.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 21.1.3-17.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.13.1-14.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8.2 Advanced Update Support VendorRed Hat Affected — Fixed in 1.9.0-15.el8_2.12 Patch available CNA
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.11.0-8.el8_4.11 Patch available CNA
- Red Hat Enterprise Linux 8.4 Telecommunications Update Service VendorRed Hat Affected — Fixed in 1.11.0-8.el8_4.11 Patch available CNA
- Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.11.0-8.el8_4.11 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.12.0-6.el8_6.12 Patch available CNA
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service VendorRed Hat Affected — Fixed in 1.12.0-6.el8_6.12 Patch available CNA
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.12.0-6.el8_6.12 Patch available CNA
- Red Hat Enterprise Linux 8.8 Extended Update Support VendorRed Hat Affected — Fixed in 1.12.0-15.el8_8.11 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.14.1-1.el9_5 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.20.11-28.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.2.7-3.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.11.0-22.el9_0.12 Patch available CNA
- Red Hat Enterprise Linux 9.2 Extended Update Support VendorRed Hat Affected — Fixed in 1.12.0-14.el9_2.9 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 1.13.1-8.el9_4.4 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux: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:8.2::appstream | 8.2 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_tus:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.6::appstream | 8.6 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.0 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:8.2::appstream Versions 8.2 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_tus:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.6::appstream Versions 8.6 — ·Red Hat
Show 8 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: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_eus:9.2::appstream | 9.2 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.4::appstream | 9.4 | — | 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: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_eus:9.2::appstream Versions 9.2 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.4::appstream Versions 9.4 — ·Red Hat
Remediation
- Fix · CNA xorg-server Fixed in 21.1.14
Red Hat 15 advisories
- RHSA-2025:12751 Released 2025-08-04 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) tigervnc-1.1.0-25.el6_10.13, tigervnc-server-1.1.0-25.el6_10.13
- Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) tigervnc-server-applet-1.1.0-25.el6_10.13, tigervnc-server-module-1.1.0-25.el6_10.13
- RHSA-2025:7458 Released 2025-05-13 · Red Hat rating Importantxorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 10) xorg-x11-server-Xwayland-24.1.5-3.el10_0
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) xorg-x11-server-Xwayland-devel-24.1.5-3.el10_0
- RHSA-2025:7165 Released 2025-05-13 · Red Hat rating Moderatexorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-Xwayland-23.2.7-3.el9_6
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) xorg-x11-server-Xwayland-23.2.7-3.el9_6, xorg-x11-server-Xwayland-devel-23.2.7-3.el9_6
Show 12 more Red Hat advisories
- RHSA-2025:7163 Released 2025-05-13 · Red Hat rating Moderatexorg-x11-server security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-1.20.11-28.el9_6, xorg-x11-server-Xdmx-1.20.11-28.el9_6, xorg-x11-server-Xephyr-1.20.11-28.el9_6 +4
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) xorg-x11-server-devel-1.20.11-28.el9_6, xorg-x11-server-source-1.20.11-28.el9_6
- RHSA-2024:10090 Released 2024-11-20 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream (v. 9) tigervnc-1.14.1-1.el9_5, tigervnc-icons-1.14.1-1.el9_5, tigervnc-license-1.14.1-1.el9_5 +4
- RHSA-2024:9901 Released 2024-11-18 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux Server (v. 7 ELS) tigervnc-1.8.0-34.el7_9, tigervnc-icons-1.8.0-34.el7_9, tigervnc-license-1.8.0-34.el7_9 +2
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) tigervnc-server-applet-1.8.0-34.el7_9, tigervnc-server-module-1.8.0-34.el7_9
- RHSA-2024:9819 Released 2024-11-18 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) tigervnc-1.11.0-8.el8_4.11, tigervnc-icons-1.11.0-8.el8_4.11, tigervnc-license-1.11.0-8.el8_4.11 +4
- Red Hat Enterprise Linux AppStream E4S (v.8.4) tigervnc-1.11.0-8.el8_4.11, tigervnc-icons-1.11.0-8.el8_4.11, tigervnc-license-1.11.0-8.el8_4.11 +4
- Red Hat Enterprise Linux AppStream TUS (v.8.4) tigervnc-1.11.0-8.el8_4.11, tigervnc-icons-1.11.0-8.el8_4.11, tigervnc-license-1.11.0-8.el8_4.11 +4
- RHSA-2024:9816 Released 2024-11-18 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) tigervnc-1.13.1-8.el9_4.4, tigervnc-icons-1.13.1-8.el9_4.4, tigervnc-license-1.13.1-8.el9_4.4 +4
- RHSA-2024:9820 Released 2024-11-18 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) tigervnc-1.12.0-6.el8_6.12, tigervnc-icons-1.12.0-6.el8_6.12, tigervnc-license-1.12.0-6.el8_6.12 +4
- Red Hat Enterprise Linux AppStream E4S (v.8.6) tigervnc-1.12.0-6.el8_6.12, tigervnc-icons-1.12.0-6.el8_6.12, tigervnc-license-1.12.0-6.el8_6.12 +4
- Red Hat Enterprise Linux AppStream TUS (v.8.6) tigervnc-1.12.0-6.el8_6.12, tigervnc-icons-1.12.0-6.el8_6.12, tigervnc-license-1.12.0-6.el8_6.12 +4
- RHSA-2024:9818 Released 2024-11-18 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) tigervnc-1.9.0-15.el8_2.12, tigervnc-icons-1.9.0-15.el8_2.12, tigervnc-license-1.9.0-15.el8_2.12 +4
- RHSA-2024:9690 Released 2024-11-14 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream EUS (v.8.8) tigervnc-1.12.0-15.el8_8.11, tigervnc-icons-1.12.0-15.el8_8.11, tigervnc-license-1.12.0-15.el8_8.11 +4
- RHSA-2024:9601 Released 2024-11-13 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) tigervnc-1.11.0-22.el9_0.12, tigervnc-icons-1.11.0-22.el9_0.12, tigervnc-license-1.11.0-22.el9_0.12 +4
- RHSA-2024:9579 Released 2024-11-13 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream EUS (v.9.2) tigervnc-1.12.0-14.el9_2.9, tigervnc-icons-1.12.0-14.el9_2.9, tigervnc-license-1.12.0-14.el9_2.9 +4
- RHSA-2024:9540 Released 2024-11-13 · Red Hat rating Importanttigervnc security update
- Red Hat Enterprise Linux AppStream (v. 8) tigervnc-1.13.1-14.el8_10, tigervnc-icons-1.13.1-14.el8_10, tigervnc-license-1.13.1-14.el8_10 +4
- RHSA-2024:8798 Released 2024-11-04 · Red Hat rating Moderatexorg-x11-server and xorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 8) xorg-x11-server-1.20.11-25.el8_10, xorg-x11-server-Xdmx-1.20.11-25.el8_10, xorg-x11-server-Xephyr-1.20.11-25.el8_10 +5
- Red Hat Enterprise Linux CRB (v. 8) xorg-x11-server-devel-1.20.11-25.el8_10, xorg-x11-server-source-1.20.11-25.el8_10
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 Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2025:7458 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2024:8798, RHSA-2024:9540 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:10090, RHSA-2025:7163, RHSA-2025:7165 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2024:9818 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2024:9819 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2024:9820 |
| Red Hat Enterprise Linux AppStream E4S (v.8.4) | Fixed | RHSA-2024:9819 |
| Red Hat Enterprise Linux AppStream E4S (v.8.6) | Fixed | RHSA-2024:9820 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2024:9601 |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2024:9690 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:9579 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2024:9816 |
| Red Hat Enterprise Linux AppStream TUS (v.8.4) | Fixed | RHSA-2024:9819 |
| Red Hat Enterprise Linux AppStream TUS (v.8.6) | Fixed | RHSA-2024:9820 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:8798 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2025:7458 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2025:7163, RHSA-2025:7165 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2024:9901 |
| Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) | Fixed | RHSA-2025:12751 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2024:9901 |
| Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) | Fixed | RHSA-2025:12751 |
Timeline
- 2026-10-02 Threatist record created from CVE-2024-9632
- 2026-10-03 Alias added: GHSA-cjcf-6ch6-g3rx
References
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Sources
- CVE-2024-9632 · CVE Program
- CVE-2024-9632 · NVD
- FIRST EPSS
- GHSA-cjcf-6ch6-g3rx · GitHub Advisory Database · CC BY 4.0
- CVE-2024-9632 · Red Hat security data · CC BY 4.0
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