TI-2026-82024 Aliases CVE-2026-93536 GHSA-q872-c2qv-7pc5

Use-after-free in X.Org Server gesture sprite handling

LOW 23CWE-122Published 2026-10-28 · Updated 2026-11-06

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: Low · None · High
Fix status: Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

X.Org X Server before 21.1.25 and XWayland before 24.1.14 are affected. A use-after-free in GestureBuildSprite() occurs because gesture sprites lack lifecycle management. An authenticated X client can crash the X server or potentially execute code.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A use after free caused by missing lifecycle management of gesture sprites in GestureBuildSprite() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash the X server or potentially execute code.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00166 5th percentileScored 2026-11-07

Fix Partial xorg-x11-server (x.org): 21.1.25xwayland (x.org): 24.1.14Red Hat: 5 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
x.org	xorg-x11-server	before 21.1.25	21.1.25	Patch available	CNA
x.org	xwayland	before 24.1.14	24.1.14	Patch available	CNA

xorg-x11-server Vendorx.org Affected before 21.1.25 Fixed in 21.1.25 Patch available CNA
xwayland Vendorx.org Affected before 24.1.14 Fixed in 24.1.14 Patch available CNA

Remediation

Update xorg-x11-server to 21.1.25 and xwayland to 24.1.14. The sources list no fixed version for Red Hat Enterprise Linux 7, 8, 9 and 10, and no fix planned for Red Hat Enterprise Linux 6.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA xorg-x11-server (x.org) Fixed in 21.1.25
Fix · CNA xwayland (x.org) Fixed in 24.1.14

Fixed in the same release

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

Release · 2026-10-28
x.org xorg-x11-server 21.1.25
10 records Highest priority Priority LOW 10 LOW
Other records, highest priority first
- TI-2026-82016 Heap buffer overflow in X.Org X Server XInput2 request handlingPriority LOW 35
- TI-2026-82013 X.Org Server Glamor CopyArea Heap Buffer OverflowPriority LOW 35
- TI-2026-82007 Heap buffer overflow in X.Org X server XKB keycode range handlingPriority LOW 35
Show all 10 records →
Release · 2026-10-28
x.org xwayland 24.1.14
10 records Highest priority Priority LOW 10 LOW
Other records, highest priority first
- TI-2026-81987 Heap buffer overflow in X.Org Server GLX RenderLarge requestPriority LOW 38
- TI-2026-82016 Heap buffer overflow in X.Org X Server XInput2 request handlingPriority LOW 35
- TI-2026-82013 X.Org Server Glamor CopyArea Heap Buffer OverflowPriority LOW 35
Show all 10 records →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-28 Threatist record created from CVE-2026-93536
2026-10-28 Alias added: GHSA-q872-c2qv-7pc5
2026-11-06 CISA SSVC decision points changed

References

Patch 1

https://gitlab.freedesktop.org/xorg/xserver/-/commit/efcfd8acc754c5ac4b2555ff375dd5101d735b0a

TI-2022-25238 In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for… CVSS 3.1HIGH 7.7
TI-1999-00519 An X server's access control is disabled (e.g. CVSS 2.0HIGH 10.0
TI-2021-11657 LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote… CVSS 3.1CRITICAL 9.8
TI-2018-10465 An issue was discovered in libX11 through 1.6.5. CVSS 3.0CRITICAL 9.8
TI-2004-00826 Multiple vulnerabilities in libXpm for 6.8.1 and earlier, as used in XFree86 and other… CVSS 2.0HIGH 10.0
TI-2016-08240 Multiple integer overflows in libXpm before 3.5.12, when a program requests parsing XPM… CVSS 3.0CRITICAL 9.8

See all 206 →

Sources

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