CVE-2026-93542: CWE-125 Out-of-bounds read in x.org libXi
An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.
AI Analysis
Technical Summary
An out-of-bounds read vulnerability exists in libXi's XI2 class parsing via the size_classes() and copy_classes() functions. This vulnerability affects libXi versions prior to 1.8.4. A malicious X server could exploit this flaw to crash the X client application, causing a denial of service condition. The CVSS 3.1 base score is 6.5 with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, and high impact on availability.
Potential Impact
Successful exploitation results in a denial of service by crashing the X client. There is no impact on confidentiality or integrity. No known active exploits have been reported.
Mitigation Recommendations
A fix is available in libXi version 1.8.4 and later. Users should upgrade to libXi 1.8.4 or newer to remediate this vulnerability. No additional mitigation steps are indicated.
CVE-2026-93542: CWE-125 Out-of-bounds read in x.org libXi
Description
An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.
CVSS v3.1
Score 6.5medium
Affected software
x.org
libXi
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An out-of-bounds read vulnerability exists in libXi's XI2 class parsing via the size_classes() and copy_classes() functions. This vulnerability affects libXi versions prior to 1.8.4. A malicious X server could exploit this flaw to crash the X client application, causing a denial of service condition. The CVSS 3.1 base score is 6.5 with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, and high impact on availability.
Potential Impact
Successful exploitation results in a denial of service by crashing the X client. There is no impact on confidentiality or integrity. No known active exploits have been reported.
Mitigation Recommendations
A fix is available in libXi version 1.8.4 and later. Users should upgrade to libXi 1.8.4 or newer to remediate this vulnerability. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- suse
- Date Reserved
- 2026-09-18T09:08:10.294Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab550d2f7a7c541068cffbc
Added to database: 09/24/2026, 16:33:22 UTC
Last enriched: 09/24/2026, 16:50:26 UTC
Last updated: 09/25/2026, 02:14:44 UTC
Views: 7
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