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CVE-2026-50264

Medium

Elevated severity or exploit probability.

CVSS base
7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.1%
4.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-787
Published 2026-06-05 · modified 2026-07-27

CVSS breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorLLocal
Attack ComplexityLLow
Privileges RequiredLLow
User InteractionNNone
ScopeUUnchanged
ConfidentialityHHigh
IntegrityHHigh
AvailabilityHHigh

Timeline

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.

Affected

redhat x.org

References

Official: NVD · CVE.org