libmspack through 0.11alpha Uninitialized Pointer Free via kwajd_open Error Path
CVE-2026-110602 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-110602, released October 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libmspack · Debian 14 | 0.11-2 | DEBIAN-CVE-2026-110602 | Oct 27, 2026 |
| libmspack0 · Ubuntu 22.04.1 LTS (jammy) | 0.10.1-2ubuntu0.1 | libmspack0 0.10.1-2ubuntu0.1 | Nov 4, 2026 |
| libmspack0t64 · Ubuntu 24.04.5 LTS (noble) | 0.11-1.1ubuntu0.24.04.1 | libmspack0t64 0.11-1.1ubuntu0.24.04.1 | Nov 4, 2026 |
| libmspack0t64 · Ubuntu 26.04.1 LTS (resolute) | 0.11-1.1ubuntu0.26.04.1 | libmspack0t64 0.11-1.1ubuntu0.26.04.1 | Nov 7, 2026 |
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