6.9
Medium
CVE-2026-93524 X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read
Description
A buffer overread in CheckKeySyms() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to leak small amounts of information from X server memory or potentially crash the X server.
CVSS 4.0 detail
Vector CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:NExploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Local
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- Interaction
- None
- Confidentiality
- Low
- Integrity
- None
- Availability
- High
- Confidentiality of other systems
- None
- Integrity of other systems
- None
- Availability of other systems
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| xorg-x11-server 21.1 | earliest → < 21.1.25 | 21.1.25 |
| xwayland 24.1 | earliest → < 24.1.14 | 24.1.14 |
Other CVEs of xorg-x11-server
The 12 CVEs of xorg-x11-server →
CVE-2026-93536
X.Org Server GestureBuildSprite Use-After-Free
5.3
Medium
CVE-2026-93523
X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write
7.8
High
CVE-2026-93522
X.Org Server Glamor CopyArea Heap Buffer Overflow
7.8
High
CVE-2026-93521
A buffer overflow in RandR ChangeProviderProperty requests in X.Org X Server before 2.1.25 and XWayland before 24.4.14…
7.8
High