{"id":"CVE-2026-110602","title":"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","summary":"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-s…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H","cwe":["CWE-824"],"vendor":"kyz","product":"libmspack","affected":["libmspack <= 0.11alpha"],"published":"2026-10-14","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:18:44.867","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110602","references":[{"url":"https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/kwajd.c#L111-L181","label":"disclosure@vulncheck.com"},{"url":"https://github.com/kyz/libmspack/commit/4d868504114346aa767d435fbb89a8b76603493f","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-pointer-free-via-kwajd-open-error-path","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00235,"epssPercentile":0.14442,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T17:59:54.674497Z"},"ingestedAt":"2026-10-14T15:36:14.002Z","slug":"CVE-2026-110602","body":"## Overview\n\nlibmspack 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":221782,"id":"CVE-2026-110602","ts":1792035800413,"field":"exploit_available","old":"false","new":"true"}]}