CVE-2026-50264
HIGH
NVD
CVSS Score
7.8
Severity
HIGH
Published
Jun 05, 2026
Vendor
unknown
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.
References
- https://access.redhat.com/security/cve/CVE-2026-50264
- https://bugzilla.redhat.com/show_bug.cgi?id=2485389
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/339c279514326134b0878fc23ce6e9520440ce7f
- https://lists.x.org/archives/xorg-announce/2026-June/003702.html
- https://redhat.atlassian.net/browse/PSIRTSUPT-16950