CVE-2026-50264
Last modified
CVE-2026-50264 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| X.Org | X Server | < 21.1.23 |
| X.Org | Xwayland | < 24.1.12 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Redhat | Enterprise Linux | 10.0 |
References
- https://access.redhat.com/security/cve/CVE-2026-50264Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2485389Issue Tracking, Third Party Advisory
- https://lists.x.org/archives/xorg-announce/2026-June/003702.htmlMailing List, Vendor Advisory
- https://redhat.atlassian.net/browse/PSIRTSUPT-16950Permissions Required
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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