CVE-2026-110602CWE-824

CVE-2026-110602

Medium · published October 14, 2026

CVSS v3.1

6.3

EPSS

Percentile

13.7

In the wild

Unconfirmed

What it is

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 record

Technical detail

CVSS v3.1: 6.3 · MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
CVSS v4.0: 5.8 · CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00235 · 13.7th percentile
Weakness: CWE-824 · Access of Uninitialized Pointer
Published: 2026-10-14T19:17Z

References (5)

https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/kwajd.c#L111-L181 · [email protected]https://github.com/kyz/libmspack/commit/4d868504114346aa767d435fbb89a8b76603493f · [email protected]https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free · [email protected]https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-pointer-free-via-kwajd-open-error-path · [email protected]https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

16 OCT 03:27Z
EPSS moved — → 0%
epss
14 OCT 14:16Z
libmspack through 0.11alpha Uninitialized Pointer Free via kwajd_open Error Path
cvelistv5
14 OCT 14:16Z
libmspack through 0.11alpha Uninitialized Pointer Free via kwajd_open Error Path
cvelistv5