{"id":"CVE-2026-110602","aliases":["AZL-108330","AZL-108393","BELL-CVE-2026-110602","DEBIAN-CVE-2026-110602","EUVD-2026-101230","GHSA-5m37-fqj8-q94j","UBUNTU-CVE-2026-110602","USN-8973-1"],"status":"published","title":"libmspack through 0.11alpha Uninitialized Pointer Free via kwajd_open Error Path","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.","severity":{"version":"4.0","score":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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00235,"percentile":0.14625,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-824"],"published":"2026-10-14T14:16:43Z","modified":"2026-11-04T03:43:13Z","fixes":[{"ecosystem":"Debian:14","package":"libmspack","fixed_in":["0.11-2"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"libmspack","fixed_in":["0.10.1-2ubuntu0.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"libmspack","fixed_in":["0.11-1.1ubuntu0.24.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.10","package":"libmspack","fixed_in":["0.11-1.1ubuntu0.26.10.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"libmspack","fixed_in":["0.11-1.1ubuntu0.26.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure 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Attackers can supply a truncated, empty, or wrong-signature KWAJ file to crash the process or obtain an arbitrary-free memory corruption primitive.","status":"published","published":"2026-10-14T14:16:43.661Z","modified":"2026-10-14T18:01:09.032Z","cvss":[{"version":"4.0","score":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","level":"medium","assessor":"cna"},{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-824"],"updated_at":"2026-11-02T13:34:26.24368Z"}],"euvd":[{"id":"EUVD-2026-101230","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.","status":"published","published":"2026-10-14T14:16:43Z","modified":"2026-10-14T18:01:09Z","cvss":[{"version":"4.0","score":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","level":"medium"}],"updated_at":"2026-11-02T17:27:13.785562Z"}],"ghsa":[{"id":"GHSA-5m37-fqj8-q94j","title":"libmspack through 0.11alpha contains an uninitialized pointer free vulnerability in kwajd_open()...","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. 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Attackers can supply a truncated, empty, or wrong-signature KWAJ file to crash the process or obtain an arbitrary-free memory corruption primitive.","status":"published","published":"2026-10-14T14:16:43.661Z","modified":"2026-10-28T11:06:33.747276195Z","cvss":[{"version":"4.0","score":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","level":"medium"}],"cwes":["CWE-824"],"updated_at":"2026-11-02T15:44:55.61515Z"},{"id":"DEBIAN-CVE-2026-110602","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.","status":"published","published":"2026-10-14T15:17:11.677Z","modified":"2026-10-26T08:00:08.487806686Z","cvss":[{"version":"4.0","score":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","level":"medium"}],"updated_at":"2026-11-02T15:45:49.824149Z"},{"id":"UBUNTU-CVE-2026-110602","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.","status":"published","published":"2026-10-14T15:17:00Z","modified":"2026-11-03T21:18:34.837596098Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"medium"},{"version":"4.0","score":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","level":"medium"}],"updated_at":"2026-11-03T21:43:43.010304Z"},{"id":"AZL-108330","title":"CVE-2026-110602 affecting package clamav 1.5.4-2","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.","status":"published","published":"2026-10-14T15:17:11Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:18.199293Z"},{"id":"AZL-108393","title":"CVE-2026-110602 affecting package libmspack 0.11alpha-1","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.","status":"published","published":"2026-10-14T15:17:11Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:18.199293Z"},{"id":"USN-8973-1","title":"libmspack vulnerability","description":"It was discovered that libmspack did not properly initialize pointers\nwhen handling errors while reading KWAJ archive headers. An attacker\ncould possibly use this issue to cause libmspack to crash, resulting\nin a denial of service, or execute arbitrary code.","status":"published","published":"2026-11-03T14:42:47Z","modified":"2026-11-04T03:43:13.405691229Z","updated_at":"2026-11-04T03:56:18.279609Z"}]}}