CVE-2026-50264
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dri2 drigetbuffers/drigetbufferswithformat
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
2th
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.
| CWE | CWE-787 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Jun 5, 2026 |
| Last Updated | Jun 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-50264 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2485389 gitlab.freedesktop.org: https://gitlab.freedesktop.org/xorg/xserver/-/commit/339c279514326134b0878fc23ce6e9520440ce7f lists.x.org: https://lists.x.org/archives/xorg-announce/2026-June/003702.html redhat.atlassian.net: https://redhat.atlassian.net/browse/PSIRTSUPT-16950
Credits
This issue was discovered by Peter Hutterer (Red Hat).