{"id":"CVE-2020-19725","aliases":["AZL-27991","AZL-37067","EUVD-2020-11623","GHSA-whrm-xv93-8gvj","UBUNTU-CVE-2020-19725"],"status":"published","title":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs...","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","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":"2026-11-10","score":0.01033,"percentile":0.64109,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2023-08-22T00:00:00Z","modified":"2026-11-09T12:49:13Z","fixes":[{"ecosystem":"Azure Linux:3","package":"z3","fixed_in":["4.13.3-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:2","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.8.7-8"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.3-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.0-2","4.4.0-3","4.4.0-3build1","4.4.0-5"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.1-0.3build3","4.4.1-0.3build4"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.4-1build1","4.8.7-3","4.8.7-4","4.8.7-4build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.12-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.13.3-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.13.3-1build1","4.13.3-1.1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"z3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.13.3-1","4.13.3-1build1"]}],"products":[{"vendor":"microsoft","product":"z3"}],"references":[{"url":"https://github.com/Z3Prover/z3/issues/3363","tags":["x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-19725","tags":["web"]},{"url":"https://github.com/advisories/GHSA-whrm-xv93-8gvj"},{"url":"https://ubuntu.com/security/CVE-2020-19725","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-19725","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-19725","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T00:00:00Z","modified":"2024-10-04T16:07:10.602Z","updated_at":"2026-11-02T14:35:49.879248Z"}],"euvd":[{"id":"EUVD-2020-11623","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T00:00:00Z","modified":"2024-10-04T16:07:10Z","updated_at":"2026-11-03T00:27:51.858084Z"}],"ghsa":[{"id":"GHSA-whrm-xv93-8gvj","title":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs...","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T21:30:25Z","modified":"2024-04-11T21:19:02Z","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":"2026-11-02T14:57:10.253701Z"}],"nvd":[{"id":"CVE-2020-19725","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T19:16:04.567Z","modified":"2026-06-17T02:59:56.12Z","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":"2026-11-02T14:06:47.910346Z"}],"osv":[{"id":"AZL-27991","title":"CVE-2020-19725 affecting package z3 4.8.7-8","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T19:16:04Z","modified":"2026-04-21T04:25:46.568588Z","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":"2026-11-02T15:28:03.46006Z"},{"id":"AZL-37067","title":"CVE-2020-19725 affecting package z3 for versions less than 4.13.3-1","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T19:16:04Z","modified":"2026-04-21T04:54:06.85588Z","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":"2026-11-02T15:28:04.608733Z"},{"id":"CVE-2020-19725","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T19:16:04.567Z","modified":"2026-10-20T10:52:23.521664779Z","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":"2026-11-02T15:44:15.212689Z"},{"id":"UBUNTU-CVE-2020-19725","description":"There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.","status":"published","published":"2023-08-22T19:16:00Z","modified":"2026-11-09T12:49:13.028498572Z","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":"2026-11-09T13:27:42.046613Z"}]}}