X.Org libXi up to 1.8.3 DEVICE_RESOLUTION buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.96+

Summaryinfo

A vulnerability described as critical has been identified in X.Org libXi up to 1.8.3. This affects an unknown function. The manipulation of the argument DEVICE_RESOLUTION results in buffer overflow. This vulnerability is identified as CVE-2026-109089. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in X.Org libXi up to 1.8.3. Affected is an unknown code block. The manipulation of the argument DEVICE_RESOLUTION with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A buffer overflow when handling DEVICE_RESOLUTION in libXi before 1.8.4 could overflow a heap, triggered by a malicious X server.

The advisory is available at gitlab.freedesktop.org. This vulnerability is traded as CVE-2026-109089 since 10/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 1.8.4 eliminates this vulnerability. Applying the patch f7836d0a0 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (suse): 🔒

CVSSv2info

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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: No
Local: No
Remote: Yes

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: libXi 1.8.4
Patch: f7836d0a0

Timelineinfo

10/12/2026 CVE reserved
10/27/2026 +15 days Advisory disclosed
10/27/2026 +0 days VulDB entry created
10/27/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: x.org

Advisory: gitlab.freedesktop.org
Status: Confirmed

CVE: CVE-2026-109089 (🔒)
GCVE (CVE): GCVE-0-2026-109089
GCVE (VulDB): GCVE-100-427446

Entryinfo

Created: 10/27/2026 17:38
Changes: 10/27/2026 17:38 (64)
Complete: 🔍
Cache ID: 216::103

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