X.Org Server XvShmPutImage Shared-Memory Bounds Overflow

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-109092
StatePUBLISHED
Assignersuse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-13 15:17:29 UTC
Updated2026-11-13 15:17:29 UTC
DescriptionIncorrectly handled negative sizes when processing ProcXvShmPutImage requests in the X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by local authenticated X clients to crash the X server or execute code.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

Problem Types: CWE-191 | CWE-191 CWE-191 Integer underflow (wrap or wraparound)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA X.Org Xwayland affected 24.1.15 rpm Not specified
CNA X.Org Xorg-x11-server affected 21.1.26 rpm Not specified

References

ReferenceSourceLinkTags
gitlab.freedesktop.org/xorg/xserver/-/commit/a4d7800f0f56469a082e3755bfa6b148c707075c [email protected] gitlab.freedesktop.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Acts1631 <[email protected]> (en)

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