CVE-2026-50264 Memory corruption in Red Hat Enterprise Linux 10
An out-of-bounds heap write in X.Org X server allows attackers to crash the server or escalate privileges if running as root.
- 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-2026-50264?
CVE-2026-50264 is a high-severity memory corruption vulnerability in Redhat Enterprise Linux, published on 5 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Weakness: CWE-787
Which versions are affected by CVE-2026-50264?
It affects 3 products.
Products include Redhat Enterprise Linux, X.org X Server, X.org Xwayland.
How do I fix CVE-2026-50264?
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-2026-50264 being exploited?
There is no known exploitation of CVE-2026-50264 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-89543, BELL-CVE-2026-50264, CLSA-2026-1792165353, CLSA-2026-1792165466, CLSA-2026-1792177938, DEBIAN-CVE-2026-50264 and 3 more.