Use-after-free in X.org Server and Xwayland - CVE-2025-26601
Published: February 25, 2025 / Updated: March 14, 2025
Vulnerability identifier: #VU104197
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-26601
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: X.org
Affected software:
X.org Server
Xwayland
X.org Server
Xwayland
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the SyncInitTrigger() function. A local user can execute arbitrary code with elevated privileges.
How to mitigate CVE-2025-26601
Install updates from vendor's website.
Sources
- https://bugzilla.redhat.com/show_bug.cgi?id=2345251
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/16a1242d
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/f52cea2f
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/8cbc90c8
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/c2857989
- https://www.zerodayinitiative.com/advisories/ZDI-25-136/