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CVE-2026-110602

CVE-2026-110602 · libmspack through 0.11alpha Uninitialized Pointer Free via kwajd_open Error Path

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.8 · Medium · EPSS 0.2%

Published
Updated

Stack: system

Affected products and versions

  • libmspack

    Versions
    • ≥ 0, ≤ 0.11alpha: Affected (custom)

    No fix published

  • libmspack Debian:12

    Versions
    • 0.11-1
    • 0.11-1.1
    • 0.11-1.1~exp1
    • 0.11-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Debian:13

    Versions
    • 0.11-1.1
    • 0.11-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Debian:14

    Versions
    • 0.11-1.1
    • 0.11-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clamav Ubuntu:Pro:14.04:LTS

    Versions
    • 0.97.8+dfsg-1ubuntu4
    • 0.97.8+dfsg-1ubuntu5
    • 0.98.1+dfsg-1ubuntu4
    • 0.98.1+dfsg-1ubuntu5
    • 0.98.1+dfsg-2ubuntu2
    • 0.98.1+dfsg-4ubuntu1
    • 0.98.1+dfsg-4ubuntu1.1
    • 0.98.5+addedllvm-0ubuntu0.14.04.1
    • 0.98.6+dfsg-0ubuntu0.14.04.1
    • 0.98.7+dfsg-0ubuntu0.14.04.1
    • 0.99.2+addedllvm-0ubuntu0.14.04.1
    • 0.99.2+addedllvm-0ubuntu0.14.04.2
    • 0.99.3+addedllvm-0ubuntu0.14.04.1
    • 0.99.4+addedllvm-0ubuntu0.14.04.1
    • 0.100.1+dfsg-1ubuntu0.14.04.1
    • 0.100.1+dfsg-1ubuntu0.14.04.2
    • 0.100.1+dfsg-1ubuntu0.14.04.3
    • 0.100.1+dfsg-1ubuntu0.14.04.4
    • 0.100.2+dfsg-1ubuntu0.14.04.1
    • 0.100.2+dfsg-1ubuntu0.14.04.2
    • 0.100.3+dfsg-0ubuntu0.14.04.1
    • 0.100.3+dfsg-0ubuntu0.14.04.1+esm1
    • 0.101.4+dfsg-0ubuntu0.14.04.1+esm1
    • 0.102.1+dfsg-0ubuntu0.14.04.1+esm1
    • 0.102.2+dfsg-0ubuntu0.14.04.1+esm1
    • 0.102.3+dfsg-0ubuntu0.14.04.1+esm1
    • 0.102.4+dfsg-0ubuntu0.14.04.1+esm1
    • 0.103.2+dfsg-0ubuntu0.14.04.1+esm1
    • 0.103.2+dfsg-0ubuntu0.14.04.1+esm2
    • 0.103.5+dfsg-0ubuntu0.14.04.1+esm1
    • 0.103.6+dfsg-0ubuntu0.14.04.1+esm1
    • 0.103.8+dfsg-0ubuntu0.14.04.1+esm1
    • 0.103.9+dfsg-0ubuntu0.14.04.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:Pro:14.04:LTS

    Versions
    • 0.4-1
    • 0.4-1ubuntu0.1~esm1
    • 0.4-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:16.04:LTS

    Versions
    • 0.5-1
    • 0.5-1ubuntu0.16.04.1
    • 0.5-1ubuntu0.16.04.2
    • 0.5-1ubuntu0.16.04.3
    • 0.5-1ubuntu0.16.04.4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:18.04:LTS

    Versions
    • 0.6-3
    • 0.6-3ubuntu0.1
    • 0.6-3ubuntu0.2
    • 0.6-3ubuntu0.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:20.04:LTS

    Versions
    • 0.10.1-1
    • 0.10.1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:22.04:LTS

    Versions
    • 0.10.1-2build1
    • 0.10.1-2build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:24.04:LTS

    Versions
    • 0.11-1
    • 0.11-1.1
    • 0.11-1.1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:26.10

    Versions
    • 0.11-1.1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmspack Ubuntu:26.04:LTS

    Versions
    • 0.11-1.1build1
    • 0.11-1.1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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