CVE-2026-94283: CWE-125 Out-of-bounds read in x.org libX11
An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.
AI Analysis
Technical Summary
An out-of-bounds read vulnerability exists in libX11's XIM attribute parser in versions prior to 1.8.14. A malicious X server can exploit this flaw to read memory beyond allocated bounds, leading to crashes of X client applications connected to the server. The vulnerability does not impact confidentiality or integrity but affects availability by causing denial of service through client crashes.
Potential Impact
The vulnerability can be exploited by a malicious X server to crash X client applications, resulting in denial of service. There is no indication of confidentiality or integrity compromise. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade libX11 to version 1.8.14 or later where this vulnerability is fixed. Since no vendor advisory or patch links are provided, confirm patch availability from the official x.org project resources. Until patched, avoid connecting to untrusted X servers to mitigate risk.
CVE-2026-94283: CWE-125 Out-of-bounds read in x.org libX11
Description
An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.
CVSS v3.1
Score 6.5medium
Affected software
x.org
libX11
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An out-of-bounds read vulnerability exists in libX11's XIM attribute parser in versions prior to 1.8.14. A malicious X server can exploit this flaw to read memory beyond allocated bounds, leading to crashes of X client applications connected to the server. The vulnerability does not impact confidentiality or integrity but affects availability by causing denial of service through client crashes.
Potential Impact
The vulnerability can be exploited by a malicious X server to crash X client applications, resulting in denial of service. There is no indication of confidentiality or integrity compromise. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade libX11 to version 1.8.14 or later where this vulnerability is fixed. Since no vendor advisory or patch links are provided, confirm patch availability from the official x.org project resources. Until patched, avoid connecting to untrusted X servers to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- suse
- Date Reserved
- 2026-09-21T09:33:25.369Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aba29d2f7a7c541066c99bd
Added to database: 09/28/2026, 08:48:18 UTC
Last enriched: 09/28/2026, 09:03:39 UTC
Last updated: 09/29/2026, 01:57:23 UTC
Views: 17
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