CVE-2025-49175 Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering extension animated cursors
A flaw in Xorg's X Rendering extension allows a client to cause an out-of-bounds read and crash the server by providing no animated cursors.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-49175?
CVE-2025-49175 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 17 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
Weakness: CWE-125
Which versions are affected by CVE-2025-49175?
How do I fix CVE-2025-49175?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-49175 being exploited?
There is no known exploitation of CVE-2025-49175 in the wild and no public exploit code.
Sources
Also known as AZL-64205, AZL-64235, AZL-64268, BELL-CVE-2025-49175, CLSA-2025-1752921642, DEBIAN-CVE-2025-49175 and 2 more.