X.Org XWayland/Xorg X11 Server EDID Display-Range Descriptors buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.3$0-$5k0.22+

Summaryinfo

A vulnerability was found in X.Org XWayland and Xorg X11 Server. It has been declared as very critical. Affected is an unknown function of the component EDID Display-Range Descriptors. Executing a manipulation can lead to buffer overflow. This vulnerability appears as CVE-2026-109091. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability was found in X.Org XWayland and Xorg X11 Server (version now known). It has been declared as very critical. This vulnerability affects some unknown processing of the component EDID Display-Range Descriptors. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A buffer overflow in handling EDID Display-Range descriptors in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by malicious monitors to crash the x server or execute cote.

The advisory is shared for download at gitlab.freedesktop.org. This vulnerability was named CVE-2026-109091 since 10/12/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/13/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
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: Buffer overflow
CWE: CWE-120 / CWE-119
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: no mitigation known
Status: 🔍

0-Day Time: 🔒

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: Not defined

CNA: suse
CVE: CVE-2026-109091 (🔒)

GCVE (CVE): GCVE-0-2026-109091
GCVE (VulDB): GCVE-100-437128

Entryinfo

Created: 11/13/2026 16:44
Changes: 11/13/2026 16:44 (61)
Complete: 🔍
Cache ID: 216::103

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