CVE-2025-26600 Xorg: xwayland: use-after-free in playreleasedevents()
A use-after-free in Xorg/Xwayland allows attackers to execute code or cause denial of service by removing a frozen device.
- 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-2025-26600?
CVE-2025-26600 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. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free.
Weakness: CWE-416
Which versions are affected by CVE-2025-26600?
It affects 4 products.
Products include Redhat Enterprise Linux, Tigervnc Tigervnc, X.org X Server, X.org Xwayland.
How do I fix CVE-2025-26600?
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-2025-26600 being exploited?
There is no known exploitation of CVE-2025-26600 in the wild and no public exploit code.
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Sources
Also known as AZL-57274, AZL-57390, AZL-57468, BELL-CVE-2025-26600, DEBIAN-CVE-2025-26600, GHSA-7q4p-93g6-4wf9 and 1 more.