CVE-2026-110602

Published: Oct 14, 2026Modified: Oct 16, 2026Deferred

5.8

Vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

Description

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.

Related CWEs

CWE-824

Access of Uninitialized Pointer

The product accesses or uses a pointer that has not been initialized.

References (5)

https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/kwajd.c#L111-L181

Source: disclosure@vulncheck.com

https://github.com/kyz/libmspack/commit/4d868504114346aa767d435fbb89a8b76603493f

Source: disclosure@vulncheck.com

https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-pointer-free-via-kwajd-open-error-path

Source: disclosure@vulncheck.com

https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.