X.Org xwayland/xorg-x11-server prior 24.1.15/21.1.26 Xv Extension integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.22+

Summaryinfo

A vulnerability marked as very critical has been reported in X.Org xwayland and xorg-x11-server. The affected element is an unknown function of the component Xv Extension. Performing a manipulation results in integer overflow. This vulnerability is identified as CVE-2026-109092. The attack is only possible with local access. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in X.Org xwayland and xorg-x11-server. It has been classified as very critical. This affects an unknown code of the component Xv Extension. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Incorrectly 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.

It is possible to read the advisory at gitlab.freedesktop.org. This vulnerability is uniquely identified as CVE-2026-109092 since 10/12/2026. The exploitability is told to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/13/2026).

Upgrading to version 24.1.15 or 21.1.26 eliminates this vulnerability. Applying the patch a4d7800f0f56469a082e3755bfa6b148c707075c is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (suse): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: xwayland/xorg-x11-server 24.1.15/21.1.26
Patch: a4d7800f0f56469a082e3755bfa6b148c707075c

Timelineinfo

10/12/2026 CVE reserved
11/13/2026 +32 days Advisory disclosed
11/13/2026 +0 days VulDB entry created
11/13/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: x.org

Advisory: gitlab.freedesktop.org
Status: Confirmed

CNA: suse
CVE: CVE-2026-109092 (🔒)

GCVE (CVE): GCVE-0-2026-109092
GCVE (VulDB): GCVE-100-437091

Entryinfo

Created: 11/13/2026 16:13
Changes: 11/13/2026 16:13 (64)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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