{"id":"CVE-2020-18974","aliases":["DEBIAN-CVE-2020-18974","EUVD-2020-10885","GHSA-4wgw-2p35-h26h","JLSEC-2026-199","UBUNTU-CVE-2020-18974"],"status":"published","title":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of...","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","severity":{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00827,"percentile":0.57748,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120"],"published":"2021-08-25T15:54:04Z","modified":"2026-10-26T12:01:00Z","fixes":[{"ecosystem":"Julia","package":"NASM_jll","fixed_in":["2.16.1+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.01-1","2.16.03-1","3.01-1"]},{"source":"osv","ecosystem":"Debian:13","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.03-1","3.01-1"]},{"source":"osv","ecosystem":"Debian:14","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.03-1","3.01-1"]},{"source":"osv","ecosystem":"Julia","package":"NASM_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.16.1+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.11.06-1really2.11.05-1","2.11.08-1","2.11.08-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.01-2","2.13.02-0.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.02-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.05-1","2.15.05-1ubuntu0.1~esm1","2.15.05-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.01-1","2.16.01-1build1","2.16.01-1ubuntu0.1~esm1","2.16.01-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.03-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.01-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"nasm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.03-1","3.01-1"]}],"products":[{"vendor":"nasm","product":"netwide_assembler"}],"references":[{"url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392568","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Vendor Advisory","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-18974"},{"url":"https://github.com/advisories/GHSA-4wgw-2p35-h26h"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-18974","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-18974","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-18974","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-18974","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2021-08-25T15:54:04Z","modified":"2024-08-04T14:08:30.435Z","updated_at":"2026-11-02T14:35:59.434367Z"}],"euvd":[{"id":"EUVD-2020-10885","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2021-08-25T15:54:04Z","modified":"2024-08-04T14:08:30Z","updated_at":"2026-11-03T03:07:25.877716Z"}],"ghsa":[{"id":"GHSA-4wgw-2p35-h26h","title":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of...","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2022-05-24T19:12:12Z","modified":"2023-01-30T05:01:46Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:46:28.825002Z"}],"nvd":[{"id":"CVE-2020-18974","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2021-08-25T16:15:08.567Z","modified":"2026-06-17T02:59:31.757Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low","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-120"],"updated_at":"2026-11-02T14:06:45.704484Z"}],"osv":[{"id":"CVE-2020-18974","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2021-08-25T16:15:08.567Z","modified":"2026-10-24T10:30:40.51143224Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"DEBIAN-CVE-2020-18974","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2021-08-25T16:15:08.567Z","modified":"2026-10-26T12:01:00.468775269Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"JLSEC-2026-199","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2026-04-27T13:45:07.015Z","modified":"2026-07-18T00:01:37.550648649Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium"},{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:47:18.159338Z"},{"id":"UBUNTU-CVE-2020-18974","description":"Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.","status":"published","published":"2021-08-25T16:15:00Z","modified":"2026-10-17T12:56:11.951215196Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:54:23.344108Z"}]}}