{"id":"CVE-2021-27419","aliases":["DEBIAN-CVE-2021-27419","EUVD-2021-14173","GHSA-499x-cvfw-94w6"],"status":"published","title":"uClibc-ng Integer Overflow or Wraparound","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01721,"percentile":0.77792,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-190"],"published":"2022-05-03T20:20:49Z","modified":"2026-10-24T10:30:54Z","fixes":[{"ecosystem":"Debian:14","package":"uclibc","fixed_in":["1.0.54-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"uclibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.35-1","1.0.54-1"]},{"source":"osv","ecosystem":"Debian:13","package":"uclibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.35-1","1.0.54-1"]},{"source":"osv","ecosystem":"Debian:14","package":"uclibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.54-1"}]}],"versions":["1.0.35-1"]}],"products":[{"vendor":"uclibc-ng","product":"uclibc-ng"},{"vendor":"uclibc-ng_project","product":"uclibc-ng"}],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","US Government Resource","advisory"]},{"url":"https://downloads.uclibc-ng.org/releases/","tags":["x_refsource_CONFIRM","x_transferred","Product","Release Notes","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27419"},{"url":"https://github.com/advisories/GHSA-499x-cvfw-94w6"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-27419","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-27419","title":"uClibc-ng Integer Overflow or Wraparound","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","status":"published","published":"2022-05-03T20:20:49Z","modified":"2025-04-16T16:25:17.246Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14173","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","status":"published","published":"2022-05-03T20:20:49Z","modified":"2025-04-16T16:25:17Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T20:52:23.922531Z"}],"ghsa":[{"id":"GHSA-499x-cvfw-94w6","title":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc...","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","status":"published","published":"2022-05-04T00:00:17Z","modified":"2023-02-01T05:01:31Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:49:44.320253Z"}],"nvd":[{"id":"CVE-2021-27419","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","status":"published","published":"2022-05-03T21:15:08.243Z","modified":"2026-06-17T03:44:49.363Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:07:06.029737Z"}],"osv":[{"id":"CVE-2021-27419","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","status":"published","published":"2022-05-03T21:15:08.243Z","modified":"2026-10-24T10:30:54.475361179Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:18.778776Z"},{"id":"DEBIAN-CVE-2021-27419","description":"uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","status":"published","published":"2022-05-03T21:15:08.243Z","modified":"2026-10-23T18:03:59.674078074Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:34.94143Z"}]}}