{"id":"CVE-2020-23914","aliases":["DEBIAN-CVE-2020-23914","EUVD-2020-16651","GHSA-jwwp-39q3-42p7","UBUNTU-CVE-2020-23914"],"status":"published","title":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the...","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00869,"percentile":0.59045,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2021-04-21T17:41:06Z","modified":"2026-10-26T12:02:39Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.0+dfsg-1","1.15.0+dfsg-1","1.16.0.3+dfsg-1","1.18.0+dfsg-1","1.19.1+dfsg-1","1.20.0+dfsg-1","1.20.0+dfsg-2","1.20.0+dfsg-3","1.22.2+dfsg-1","1.22.2+dfsg-2","1.22.2+dfsg-3"]},{"source":"osv","ecosystem":"Debian:13","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.0+dfsg-2","1.20.0+dfsg-3","1.22.2+dfsg-1","1.22.2+dfsg-2","1.22.2+dfsg-3"]},{"source":"osv","ecosystem":"Debian:14","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.0+dfsg-2","1.20.0+dfsg-3","1.22.2+dfsg-1","1.22.2+dfsg-2","1.22.2+dfsg-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"salmon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.0+ds1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"salmon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.2+ds1-1","1.10.2+ds1-1build1","1.10.2+ds1-1build2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.14.0+dfsg-1build1","1.15.0+dfsg-1","1.16.0.3+dfsg-1","1.18.0+dfsg-1","1.18.0+dfsg-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.0+dfsg-2build1","1.20.0+dfsg-2build2","1.20.0+dfsg-3","1.20.0+dfsg-3ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"salmon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.2+ds1-1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.22.2+dfsg-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"salmon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.3+ds1-3"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"retroarch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.0+dfsg-3","1.22.2+dfsg-1","1.22.2+dfsg-2","1.22.2+dfsg-2build1","1.22.2+dfsg-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"salmon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.2+ds1-1build2","1.10.3+ds1-1","1.10.3+ds1-3"]}],"products":[{"vendor":"cpp-peglib_project","product":"cpp-peglib"}],"references":[{"url":"https://github.com/yhirose/cpp-peglib/issues/121","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://github.com/yhirose/cpp-peglib/commit/0061f393de54cf0326621c079dc2988336d1ebb3","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-23914"},{"url":"https://github.com/advisories/GHSA-jwwp-39q3-42p7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-23914","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-23914","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-23914","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-23914","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-04-21T17:41:06Z","modified":"2024-08-04T15:05:11.362Z","updated_at":"2026-11-02T14:35:49.209579Z"}],"euvd":[{"id":"EUVD-2020-16651","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-04-21T17:41:06Z","modified":"2024-08-04T15:05:11Z","updated_at":"2026-11-03T03:07:20.733107Z"}],"ghsa":[{"id":"GHSA-jwwp-39q3-42p7","title":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the...","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2022-05-24T17:48:02Z","modified":"2023-01-29T05:07:19Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:46:09.625645Z"}],"nvd":[{"id":"CVE-2020-23914","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-04-21T18:15:08.237Z","modified":"2026-06-17T03:05:05.27Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:39.25999Z"}],"osv":[{"id":"CVE-2020-23914","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-04-21T18:15:08.237Z","modified":"2026-10-20T13:24:42.417627012Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:15.534837Z"},{"id":"DEBIAN-CVE-2020-23914","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-04-21T18:15:08.237Z","modified":"2026-10-26T12:02:39.668741071Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:33.729655Z"},{"id":"UBUNTU-CVE-2020-23914","description":"An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-04-21T18:15:00Z","modified":"2026-10-17T12:55:52.43036178Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:23.905183Z"}]}}