An out-of-bounds read in libXi's XListInputDevices() in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client. (CVE-2026-93545)
Description
An out-of-bounds read vulnerability exists in libXi's XListInputDevices() function in versions before 1.8.4. This flaw could allow a malicious X server to crash an attached X client, causing a denial of service. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. It affects multiple specific versions of libXi prior to 1.8.4. No known exploits are reported in the wild, and no patch information is provided in the source data.
CVSS v3.1
Score 6.5medium
Affected software
pkg:deb/ubuntu/libxi?arch=source&distro=esm-infra/xenialpkg:deb/ubuntu/libxi?arch=source&distro=bionicpkg:deb/ubuntu/libxi?arch=source&distro=focalpkg:deb/ubuntu/libxi?arch=source&distro=jammypkg:deb/ubuntu/libxi?arch=source&distro=noblepkg:deb/ubuntu/libxi?arch=source&distro=stonkingpkg:deb/ubuntu/libxi?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-93545 describes an out-of-bounds read in the XListInputDevices() function of libXi versions before 1.8.4. This vulnerability can be triggered by a malicious X server to crash an X client using the affected library. The issue impacts availability by causing client crashes but does not affect confidentiality or integrity. The CVSS 3.1 vector indicates the attack requires network access, no privileges, and user interaction, with low attack complexity and unchanged scope.
Potential Impact
The primary impact is a denial of service condition where a malicious X server can cause an attached X client to crash due to an out-of-bounds read. There is no indication of data confidentiality or integrity compromise. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor vendor communications for an official fix or update to libXi version 1.8.4 or later. Until then, cautious interaction with untrusted X servers is advised.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-93545
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5242cdf04f656658586
Added to database: 10/17/2026, 22:22:28 UTC
Last enriched: 10/17/2026, 23:06:05 UTC
Last updated: 10/17/2026, 23:06:05 UTC
Views: 3
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