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.

The version of libXi installed on the remote host is prior to 1.8.4. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-289-02 advisory.

    New libXi packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the libXi security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-93542)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-93542)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
366713	Slackware Linux 15.0 / current libXi Multiple Vulnerabilities (SSA:2026-289-02)	Nessus	Slackware Local Security Checks	Local	medium
472769	Echo: libxi: security update to 2:1.8.2-1+e1	Tenable Cloud Security	Echo Local Security Checks	Local	medium
472769	Echo: libxi: security update to 2:1.8.2-1+e1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
349962	Linux Distros Unpatched Vulnerability : CVE-2026-93542	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-93542

medium

Tenable Plugins

medium

medium

medium

medium