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TI-2021-02902 Aliases CVE-2021-4008GHSA-h4h6-8v79-695g

Memory corruption in xorg-x11-server

Priority LOW 35CWE-119Published · 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: 9 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcRenderCompositeGlyphs function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Why it matters now

EPSS 0.00608 49th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 9 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—xorg-x11-serverxorg-x11-server 21.1.2, xorg-x11-server 1.20.14—No fix listedCNA
  • xorg-x11-server Vendor— Affected xorg-x11-server 21.1.2, xorg-x11-server 1.20.14 Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*before 1.20.14Vulnerablex.org
cpe:2.3:a:x.org:x_server:21.1.0:*:*:*:*:*:*:*21.1.0Vulnerablex.org
cpe:2.3:a:x.org:x_server:21.1.1:*:*:*:*:*:*:*21.1.1Vulnerablex.org
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:* Versions before 1.20.14 Vulnerable ·x.org
  • cpe:2.3:a:x.org:x_server:21.1.0:*:*:*:*:*:*:* Versions 21.1.0 Vulnerable ·x.org
  • cpe:2.3:a:x.org:x_server:21.1.1:*:*:*:*:*:*:* Versions 21.1.1 Vulnerable ·x.org
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

Red Hat 2 advisories

  • RHSA-2022:1917 Released 2022-05-10 · Red Hat rating Moderate
    xorg-x11-server and xorg-x11-server-Xwayland security update
    • Red Hat Enterprise Linux AppStream (v. 8) xorg-x11-server-1.20.11-5.el8, xorg-x11-server-Xdmx-1.20.11-5.el8, xorg-x11-server-Xephyr-1.20.11-5.el8 +5
    • Red Hat Enterprise Linux CRB (v. 8) xorg-x11-server-devel-1.20.11-5.el8, xorg-x11-server-source-1.20.11-5.el8
  • RHSA-2022:0003 Released 2022-01-03 · Red Hat rating Important
    xorg-x11-server security update
    • Red Hat Enterprise Linux Client (v. 7) xorg-x11-server-1.20.4-17.el7_9, xorg-x11-server-Xephyr-1.20.4-17.el7_9, xorg-x11-server-Xorg-1.20.4-17.el7_9 +1
    • Red Hat Enterprise Linux Client Optional (v. 7) xorg-x11-server-Xdmx-1.20.4-17.el7_9, xorg-x11-server-Xnest-1.20.4-17.el7_9, xorg-x11-server-Xvfb-1.20.4-17.el7_9 +3
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) xorg-x11-server-1.20.4-17.el7_9, xorg-x11-server-Xdmx-1.20.4-17.el7_9, xorg-x11-server-Xephyr-1.20.4-17.el7_9 +7
    • Red Hat Enterprise Linux Server (v. 7) xorg-x11-server-1.20.4-17.el7_9, xorg-x11-server-Xephyr-1.20.4-17.el7_9, xorg-x11-server-Xorg-1.20.4-17.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7) xorg-x11-server-Xdmx-1.20.4-17.el7_9, xorg-x11-server-Xnest-1.20.4-17.el7_9, xorg-x11-server-Xvfb-1.20.4-17.el7_9 +4
    • Red Hat Enterprise Linux Workstation (v. 7) xorg-x11-server-1.20.4-17.el7_9, xorg-x11-server-Xephyr-1.20.4-17.el7_9, xorg-x11-server-Xorg-1.20.4-17.el7_9 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) xorg-x11-server-Xdmx-1.20.4-17.el7_9, xorg-x11-server-Xnest-1.20.4-17.el7_9, xorg-x11-server-Xvfb-1.20.4-17.el7_9 +3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    xorg-x11-server — FEDORA-2021-69e96c8f68

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2021-02905 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02904 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02903 Memory corruption in xorg-x11-serverPriority LOW 35
    Show all 4 records → Advisory →
  • Advisory ·

    xorg-x11-server — FEDORA-2021-664a6554a1

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2021-02905 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02904 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02903 Memory corruption in xorg-x11-serverPriority LOW 35
    Show all 4 records → Advisory →
Show 3 more groups
  • Advisory ·

    xorg-x11-server — FEDORA-2021-2eb603951b

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2021-02905 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02904 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02903 Memory corruption in xorg-x11-serverPriority LOW 35
    Show all 4 records → Advisory →
  • Advisory ·

    xorg-x11-server — FEDORA-2021-a7fd510294

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2021-02905 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02904 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02903 Memory corruption in xorg-x11-serverPriority LOW 35
    Show all 4 records → Advisory →
  • Advisory ·

    xorg-x11-server — DSA-5027

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2021-02905 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02904 Memory corruption in xorg-x11-serverPriority LOW 35
    • TI-2021-02903 Memory corruption in xorg-x11-serverPriority LOW 35
    Show all 4 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:1917
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2022:1917
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:0003
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:0003
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2022:0003
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:0003
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:0003
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:0003
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:0003
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4008
  2. 2026-10-03 Alias added: GHSA-h4h6-8v79-695g

References

Advisory 11

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences