{"id":"CVE-2021-33453","aliases":["DEBIAN-CVE-2021-33453","EUVD-2021-20157","GHSA-5xh9-fg67-82m2","UBUNTU-CVE-2021-33453"],"status":"published","title":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in...","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00365,"percentile":0.3074,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2022-07-26T12:36:24Z","modified":"2026-10-23T18:03:14Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.651-2","0.651-3","0.660-1"]},{"source":"osv","ecosystem":"Debian:13","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.651-3","0.660-1"]},{"source":"osv","ecosystem":"Debian:14","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.651-3","0.660-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.608-2","0.616-1","0.616-1ubuntu0.1~esm","0.616-1ubuntu0.1~esm1","0.616-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.621-1","0.621-1ubuntu0.1~esm1","0.621-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.631-1","0.631-1ubuntu0.1~esm1","0.631-1+deb9u1build0.18.04.1","0.631-1+deb9u3build0.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.631+git180528-1","0.631+git180528-1build1","0.631+git180528-1+deb10u1build0.20.04.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.641-1","0.651-2","0.651-2ubuntu0.22.04.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.651-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.651-2ubuntu1","0.651-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.660-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"lrzip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.651-3","0.651-3build1","0.660-1"]}],"products":[{"vendor":"long_range_zip_project","product":"long_range_zip"}],"references":[{"url":"https://github.com/ckolivas/lrzip/issues/199","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33453"},{"url":"https://github.com/advisories/GHSA-5xh9-fg67-82m2"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-33453","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-33453","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33453","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-33453","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-26T12:36:24Z","modified":"2024-08-03T23:50:42.725Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20157","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-26T12:36:24Z","modified":"2024-08-03T23:50:42Z","updated_at":"2026-11-03T03:24:34.304953Z"}],"ghsa":[{"id":"GHSA-5xh9-fg67-82m2","title":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in...","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-27T00:00:46Z","modified":"2023-01-27T05:07:32Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:43:08.798618Z"}],"nvd":[{"id":"CVE-2021-33453","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-26T13:15:09.253Z","modified":"2026-06-17T03:54:34.74Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:07:06.501652Z"}],"osv":[{"id":"CVE-2021-33453","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-26T13:15:09.253Z","modified":"2026-10-20T10:53:47.447206906Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.793849Z"},{"id":"DEBIAN-CVE-2021-33453","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-26T13:15:09.253Z","modified":"2026-10-23T18:03:14.760792388Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"UBUNTU-CVE-2021-33453","description":"An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.","status":"published","published":"2022-07-26T13:15:00Z","modified":"2026-10-17T12:56:19.93981431Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:27.870979Z"}]}}