CVE-2025-26594 X.org: xwayland: use-after-free of the root cursor
A use-after-free flaw in X.org Xwayland allows attackers to cause denial of service or execute arbitrary code by freeing the root cursor.
- 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-2025-26594?
CVE-2025-26594 is a high-severity use after free vulnerability in Redhat Enterprise Linux, published on 25 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A use-after-free flaw was found in X.Org and Xwayland. The root cursor is referenced in the X server as a global variable. If a client frees the root cursor, the internal reference points to freed memory and causes a use-after-free.
Weakness: CWE-416
Which versions are affected by CVE-2025-26594?
It affects 4 products.
Products include Redhat Enterprise Linux, Tigervnc Tigervnc, X.org X Server, X.org Xwayland.
How do I fix CVE-2025-26594?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-26594 being exploited?
There is no known exploitation of CVE-2025-26594 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- CVE-2018-14667 Red Hat JBoss RichFaces Framework Expression Language Injection
- CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit
- CVE-2018-25011 Memory corruption in libwebp
- CVE-2018-25014 Other in libwebp
- CVE-2014-3585 Supply chain in redhat-upgrade-tool
Sources
Also known as AZL-57292, AZL-57359, AZL-57474, BELL-CVE-2025-26594, DEBIAN-CVE-2025-26594, GHSA-gc32-fmf5-c742 and 1 more.