{"id":"CVE-2026-110602","summary":"libmspack through 0.11alpha Uninitialized Pointer Free via kwajd_open Error Path","details":"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.","modified":"2026-10-15T02:47:23.260359050Z","published":"2026-10-14T14:16:43.661Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110602.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-824"]},"references":[{"type":"WEB","url":"https://github.com"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110602.json"},{"type":"PACKAGE","url":"https://github.com/kyz/libmspack"},{"type":"ARTICLE","url":"https://github.com/kyz/libmspack/blob/v0.11alpha/libmspack/mspack/kwajd.c#L111-L181"},{"type":"FIX","url":"https://github.com/kyz/libmspack/commit/4d868504114346aa767d435fbb89a8b76603493f"},{"type":"ADVISORY","url":"https://hackmd.io/@haind-pwn/libmspack-kwaj-uninitialized-free"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110602"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/libmspack-through-0-11alpha-uninitialized-pointer-free-via-kwajd-open-error-path"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kyz/libmspack","events":[{"introduced":"0"},{"last_affected":"370d41b64230907f7ca16586bcc1cd93304718f9"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"0.11alpha"}]}}],"versions":["v0.11alpha","v0.10.1alpha","v1.9.1","v0.10alpha","v0.9.1alpha","v1.9","v0.9alpha","v1.8","v0.8alpha","v0.7.1alpha","1.7","v0.7alpha","v0.6alpha","v1.5","v0.5alpha","v0.4alpha","v1.4","v0.3alpha","v1.3","v1.2","v0.0.20060920alpha","v1.1","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110602.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}