libmspack through 0.11alpha contains an uninitialized pointer free vulnerability in kwajd_open() in mspack/kwajd.c that frees unzeroed filename and extra pointers on header read errors. Attackers can supply a truncated, empty, or wrong-signature KWAJ file to crash the process or obtain an arbitrary-free memory corruption primitive.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / 26.10 host has packages installed that are affected by a vulnerability as referenced in the USN-8973-1 advisory.

    It was discovered that libmspack did not properly initialize pointers when handling errors while reading     KWAJ archive headers. An attacker could possibly use this issue to cause libmspack to crash, resulting in     a denial of service, or execute arbitrary code.

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

Note that Nessus has not tested for this issue 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:

  - libmspack through 0.11alpha contains an uninitialized pointer free vulnerability in kwajd_open() in
    mspack/kwajd.c that frees unzeroed filename and extra pointers on header read errors. Attackers can supply
    a truncated, empty, or wrong-signature KWAJ file to crash the process or obtain an arbitrary-free memory
    corruption primitive. (CVE-2026-110602)

The remote Fedora 46 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-ed3c0a9bce advisory.

    Automatic update for libmspack-0.11-0.1.alpha.fc46.

    ##### **Changelog**

    ```
    * Wed Oct 21 2026 Dan Hork <dan[at]danny.cz> - 0.11-0.1.alpha
    - updated to 0.11alpha
    - fix CVE-2026-110602 (rhbz#2558186)
    - add %check section

    ```

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

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

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

  - libmspack through 0.11alpha contains an uninitialized pointer free vulnerability in kwajd_open() in     mspack/kwajd.c that frees unzeroed filename and extra pointers on header read errors. Attackers can supply     a truncated, empty, or wrong-signature KWAJ file to crash the process or obtain an arbitrary-free memory     corruption primitive. (CVE-2026-110602)

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

ID	Name	Product	Family	Type	Severity
375777	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / 26.10 : libmspack vulnerability (USN-8973-1)	Nessus	Ubuntu Local Security Checks	Local	medium
477735	Echo: libmspack: security update to 0.11-2	Tenable Cloud Security	Echo Local Security Checks	Local	medium
477735	Echo: libmspack: security update to 0.11-2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
369951	Fedora 46 : libmspack (2026-ed3c0a9bce)	Nessus	Fedora Local Security Checks	Local	medium
365717	Linux Distros Unpatched Vulnerability : CVE-2026-110602	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-110602

medium

Tenable Plugins

medium

medium

medium

medium

medium