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Fencer Vulns
high 7.8

CVE-2024-31083 json

Xorg-x11-server: use-after-free in procrenderaddglyphs

published 2024-04-05 2 y ago modified 2026-11-04 4 d ago also EUVD-2024-28994

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

A use-after-free vulnerability was found in the ProcRenderAddGlyphs() function of Xorg servers. This issue occurs when AllocateGlyph() is called to store new glyphs sent by the client to the X server, potentially resulting in multiple entries pointing to the same non-refcounted glyphs. Consequently, ProcRenderAddGlyphs() may free a glyph, leading to a use-after-free scenario when the same glyph pointer is subsequently accessed. This flaw allows an authenticated attacker to execute arbitrary code on the system by sending a specially crafted request.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION 0:1.1.0-25.el6_10.13
  • Red Hat Red Hat Enterprise Linux 7 0:1.8.0-33.el7_9, 0:1.20.4-29.el7_9
  • Red Hat Red Hat Enterprise Linux 8 0:1.13.1-2.el8_9.10, 0:1.13.1-10.el8_10, 0:1.20.11-23.el8_10, 0:21.1.3-16.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:1.9.0-15.el8_2.11
  • Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service 0:1.9.0-15.el8_2.11
  • Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions 0:1.9.0-15.el8_2.11
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.11.0-8.el8_4.10
  • Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:1.11.0-8.el8_4.10
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:1.11.0-8.el8_4.10
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:1.12.0-6.el8_6.11
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:1.12.0-15.el8_8.10
  • Red Hat Red Hat Enterprise Linux 9 0:1.13.1-8.el9_4.3, 0:1.20.11-26.el9, 0:23.2.7-1.el9
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:1.11.0-22.el9_0.11
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:1.12.0-14.el9_2.8
  • xwayland Debian 14, Debian 13 2:23.2.6-1
  • xorg-server Debian 12 2:21.1.7-3+deb12u7
  • xorg-server Debian 14, Debian 13 2:21.1.11-3

debian advisories DEBIAN-CVE-2024-31083

  • xwayland Ubuntu 22.04 LTS 2:22.1.1-1ubuntu0.13
  • xorg-server Ubuntu 20.04 LTS 2:1.20.13-1ubuntu1~20.04.17
  • xorg-server Ubuntu 22.04 LTS 2:21.1.4-2ubuntu1.7~22.04.10
  • xorg-server Ubuntu 24.04 LTS 2:21.1.12-1ubuntu1
  • xorg-server Ubuntu Pro 14.04 LTS 2:1.15.1-0ubuntu2.11+esm11
  • xorg-server Ubuntu Pro 16.04 LTS 2:1.18.4-0ubuntu0.12+esm13
  • xorg-server Ubuntu Pro 18.04 LTS 2:1.19.6-1ubuntu4.15+esm8

ubuntu advisories UBUNTU-CVE-2024-31083

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xorg-x11-server RHEL 9 1.20.11-26.el9
  • xorg-x11-server-Xdmx RHEL 9 1.20.11-26.el9
  • xorg-x11-server-Xorg RHEL 9 1.20.11-26.el9
  • xorg-x11-server-Xvfb RHEL 9 1.20.11-26.el9
  • xorg-x11-server-Xnest RHEL 9 1.20.11-26.el9
  • xorg-x11-server-common RHEL 9 1.20.11-26.el9
  • xorg-x11-server-source RHEL 9 1.20.11-26.el9
  • xorg-x11-server-Xephyr RHEL 9 1.20.11-26.el9

red hat advisories RHSA-2025:12751RHSA-2024:9122RHSA-2024:9093RHSA-2024:2616RHSA-2024:2080RHSA-2024:2042

  • xwayland SLE Workstation Extension 15 SP6, openSUSE Leap 15.6 24.1.1-150600.5.3.1
  • dri3proto SLE Module for Development Tools 15 SP6, SLE Module for Development Tools 15 SP5, openSUSE Leap 15.6 +1 more 1.2-150100.6.3.1
  • presentproto SLE Module for Development Tools 15 SP6, openSUSE Leap 15.6 1.3-150600.3.3.1
  • wayland-protocols SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 1.36-150600.4.3.1
  • xwayland SLE Workstation Extension 15 SP5, openSUSE Leap 15.5 22.1.5-150500.7.22.1
  • xorg-x11-server SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.19.6-10.74.1
  • xorg-x11-server SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 21.1.4-150500.7.26.1
  • xorg-x11-server SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +5 more 1.20.3-150200.22.5.96.1

suse advisories SUSE-SU-2024:2776-1SUSE-SU-2024:1264-1SUSE-SU-2024:1263-1SUSE-SU-2024:1262-1SUSE-SU-2024:1261-1SUSE-SU-2024:1260-1

  • xorg-x11-server openSUSE Tumbleweed 21.1.12-1.1
  • xwayland openSUSE Tumbleweed 23.2.5-1.1

opensuse advisories openSUSE-SU-2024:13828-1openSUSE-SU-2024:13829-1

  • xorg-x11-server-Xwayland AlmaLinux 9 23.2.7-1.el9
  • xorg-x11-server-Xdmx AlmaLinux 9 1.20.11-26.el9
  • xorg-x11-server-Xorg AlmaLinux 9 1.20.11-26.el9
  • xorg-x11-server-Xvfb AlmaLinux 9 1.20.11-26.el9
  • xorg-x11-server-Xnest AlmaLinux 9 1.20.11-26.el9
  • xorg-x11-server-common AlmaLinux 9 1.20.11-26.el9
  • xorg-x11-server-source AlmaLinux 9 1.20.11-26.el9
  • xorg-x11-server-Xephyr AlmaLinux 9 1.20.11-26.el9

almalinux advisories ALSA-2024:9093ALSA-2024:9122ALSA-2024:3343ALSA-2024:3258ALSA-2024:3261ALSA-2024:2616

  • xorg-x11-server-Xwayland Rocky Linux 9 23.2.7-1.el9
  • xorg-x11-server Rocky Linux 9 1.20.11-26.el9
  • xorg-x11-server Rocky Linux 8 1.20.11-23.el8_10
  • tigervnc Rocky Linux 8 1.13.1-10.el8_10
  • xorg-x11-server-Xwayland Rocky Linux 8 21.1.3-16.el8_10
  • tigervnc Rocky Linux 9 1.13.1-8.el9_4.3
  • tigervnc Rocky Linux 8 1.13.1-2.el8_9.10

rocky linux advisories RLSA-2024:9093RLSA-2024:9122RLSA-2024:3258RLSA-2024:3261RLSA-2024:3343RLSA-2024:2616

  • xwayland Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 23.2.5-r0
  • xorg-server Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 21.1.12-r0

alpine advisories ALPINE-CVE-2024-31083

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xorg-x11-server CBL-Mariner 2.0 1.20.10-11

azure linux advisories AZL-39307

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-31083 updated cvss 7.8

xorg-x11-server: Use-after-free in ProcRenderAddGlyphs

  • Red Hat Enterprise Linux 6 xorg-x11-server, xorg-x11-server-Xdmx, xorg-x11-server-Xorg, xorg-x11-server-Xvfb, xorg-x11-server-Xnest, xorg-x11-server-common, +2 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 9) xorg-x11-server-source 1.20.11-26.el9, xorg-x11-server-Xwayland 23.2.7-1.el9
    fixed: vendor fix RHSA-2024:9122
  • Red Hat Enterprise Linux AppStream (v. 8) tigervnc 1.13.1-10.el8_10, tigervnc 1.13.1-2.el8_9.10, tigervnc-icons 1.13.1-10.el8_10, tigervnc-icons 1.13.1-2.el8_9.10, tigervnc-server 1.13.1-10.el8_10, tigervnc-license 1.13.1-10.el8_10, +16 more
    fixed: vendor fix RHSA-2024:3261
  • Red Hat Enterprise Linux AppStream (v. 9) tigervnc 1.13.1-8.el9_4.3, xorg-x11-server 1.20.11-26.el9, tigervnc-icons 1.13.1-8.el9_4.3, tigervnc-server 1.13.1-8.el9_4.3, tigervnc-license 1.13.1-8.el9_4.3, tigervnc-selinux 1.13.1-8.el9_4.3, +9 more
    fixed: vendor fix RHSA-2024:2616
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) tigervnc 1.9.0-15.el8_2.11, tigervnc-icons 1.9.0-15.el8_2.11, tigervnc-server 1.9.0-15.el8_2.11, tigervnc-license 1.9.0-15.el8_2.11, tigervnc-server-applet 1.9.0-15.el8_2.11, tigervnc-server-module 1.9.0-15.el8_2.11, +1 more
    fixed: vendor fix RHSA-2024:2041
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) tigervnc 1.11.0-8.el8_4.10, tigervnc-icons 1.11.0-8.el8_4.10, tigervnc-server 1.11.0-8.el8_4.10, tigervnc-license 1.11.0-8.el8_4.10, tigervnc-selinux 1.11.0-8.el8_4.10, tigervnc-server-module 1.11.0-8.el8_4.10, +1 more
    fixed: vendor fix RHSA-2024:2042
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) tigervnc 1.9.0-15.el8_2.11, tigervnc-icons 1.9.0-15.el8_2.11, tigervnc-server 1.9.0-15.el8_2.11, tigervnc-license 1.9.0-15.el8_2.11, tigervnc-server-applet 1.9.0-15.el8_2.11, tigervnc-server-module 1.9.0-15.el8_2.11, +1 more
    fixed: vendor fix RHSA-2024:2041
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) tigervnc 1.11.0-8.el8_4.10, tigervnc-icons 1.11.0-8.el8_4.10, tigervnc-server 1.11.0-8.el8_4.10, tigervnc-license 1.11.0-8.el8_4.10, tigervnc-selinux 1.11.0-8.el8_4.10, tigervnc-server-module 1.11.0-8.el8_4.10, +1 more
    fixed: vendor fix RHSA-2024:2042
show 13 more
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) tigervnc 1.12.0-6.el8_6.11, tigervnc-icons 1.12.0-6.el8_6.11, tigervnc-server 1.12.0-6.el8_6.11, tigervnc-license 1.12.0-6.el8_6.11, tigervnc-selinux 1.12.0-6.el8_6.11, tigervnc-server-module 1.12.0-6.el8_6.11, +1 more
    fixed: vendor fix RHSA-2024:2039
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) tigervnc 1.12.0-15.el8_8.10, tigervnc-icons 1.12.0-15.el8_8.10, tigervnc-server 1.12.0-15.el8_8.10, tigervnc-license 1.12.0-15.el8_8.10, tigervnc-selinux 1.12.0-15.el8_8.10, tigervnc-server-module 1.12.0-15.el8_8.10, +1 more
    fixed: vendor fix RHSA-2024:2038
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) tigervnc 1.11.0-22.el9_0.11, tigervnc-icons 1.11.0-22.el9_0.11, tigervnc-server 1.11.0-22.el9_0.11, tigervnc-license 1.11.0-22.el9_0.11, tigervnc-selinux 1.11.0-22.el9_0.11, tigervnc-server-module 1.11.0-22.el9_0.11, +1 more
    fixed: vendor fix RHSA-2024:2036
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) tigervnc 1.12.0-14.el9_2.8, tigervnc-icons 1.12.0-14.el9_2.8, tigervnc-server 1.12.0-14.el9_2.8, tigervnc-license 1.12.0-14.el9_2.8, tigervnc-selinux 1.12.0-14.el9_2.8, tigervnc-server-module 1.12.0-14.el9_2.8, +1 more
    fixed: vendor fix RHSA-2024:2040
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) tigervnc 1.9.0-15.el8_2.11, tigervnc-icons 1.9.0-15.el8_2.11, tigervnc-server 1.9.0-15.el8_2.11, tigervnc-license 1.9.0-15.el8_2.11, tigervnc-server-applet 1.9.0-15.el8_2.11, tigervnc-server-module 1.9.0-15.el8_2.11, +1 more
    fixed: vendor fix RHSA-2024:2041
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) tigervnc 1.11.0-8.el8_4.10, tigervnc-icons 1.11.0-8.el8_4.10, tigervnc-server 1.11.0-8.el8_4.10, tigervnc-license 1.11.0-8.el8_4.10, tigervnc-selinux 1.11.0-8.el8_4.10, tigervnc-server-module 1.11.0-8.el8_4.10, +1 more
    fixed: vendor fix RHSA-2024:2042
  • Red Hat Enterprise Linux Client (v. 7) tigervnc 1.8.0-33.el7_9, tigervnc-icons 1.8.0-33.el7_9, tigervnc-server 1.8.0-33.el7_9, tigervnc-license 1.8.0-33.el7_9, xorg-x11-server 1.20.4-29.el7_9, xorg-x11-server-Xorg 1.20.4-29.el7_9, +3 more Red Hat Enterprise Linux Client Optional (v. 7) xorg-x11-server-Xdmx 1.20.4-29.el7_9, xorg-x11-server-Xvfb 1.20.4-29.el7_9, tigervnc-server-applet 1.8.0-33.el7_9, tigervnc-server-module 1.8.0-33.el7_9, xorg-x11-server-Xnest 1.20.4-29.el7_9, xorg-x11-server-source 1.20.4-29.el7_9, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) tigervnc 1.8.0-33.el7_9, tigervnc-icons 1.8.0-33.el7_9, tigervnc-server 1.8.0-33.el7_9, xorg-x11-server 1.20.4-29.el7_9, xorg-x11-server-Xdmx 1.20.4-29.el7_9, xorg-x11-server-Xorg 1.20.4-29.el7_9, +8 more
    fixed: vendor fix RHSA-2024:2080
  • Red Hat Enterprise Linux CRB (v. 8) xorg-x11-server-source 1.20.11-23.el8_10
    fixed: vendor fix RHSA-2024:3258
  • 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
    fixed: vendor fix RHSA-2025:12751
  • Red Hat Enterprise Linux Server (v. 7) tigervnc 1.8.0-33.el7_9, tigervnc-icons 1.8.0-33.el7_9, tigervnc-server 1.8.0-33.el7_9, tigervnc-license 1.8.0-33.el7_9, xorg-x11-server 1.20.4-29.el7_9, xorg-x11-server-Xorg 1.20.4-29.el7_9, +3 more
    fixed: vendor fix RHSA-2024:2080
  • 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
    fixed: vendor fix RHSA-2025:12751
  • Red Hat Enterprise Linux Server Optional (v. 7) xorg-x11-server-Xdmx 1.20.4-29.el7_9, xorg-x11-server-Xvfb 1.20.4-29.el7_9, tigervnc-server-applet 1.8.0-33.el7_9, tigervnc-server-module 1.8.0-33.el7_9, xorg-x11-server-Xnest 1.20.4-29.el7_9, xorg-x11-server-source 1.20.4-29.el7_9, +1 more Red Hat Enterprise Linux Workstation (v. 7) tigervnc 1.8.0-33.el7_9, tigervnc-icons 1.8.0-33.el7_9, tigervnc-server 1.8.0-33.el7_9, tigervnc-license 1.8.0-33.el7_9, xorg-x11-server 1.20.4-29.el7_9, xorg-x11-server-Xorg 1.20.4-29.el7_9, +3 more Red Hat Enterprise Linux Workstation Optional (v. 7) xorg-x11-server-Xdmx 1.20.4-29.el7_9, xorg-x11-server-Xvfb 1.20.4-29.el7_9, tigervnc-server-applet 1.8.0-33.el7_9, tigervnc-server-module 1.8.0-33.el7_9, xorg-x11-server-Xnest 1.20.4-29.el7_9, xorg-x11-server-source 1.20.4-29.el7_9, +1 more
    fixed: vendor fix RHSA-2024:2080
  • Red Hat Enterprise Linux 10 tigervnc, xorg-x11-server, xorg-x11-server-Xwayland
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.86% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.