{"id":"CVE-2025-21898","state":"PUBLISHED","title":"ftrace: Avoid potential division by zero in function_stat_show()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Avoid potential division by zero in function_stat_show()\n\nCheck whether denominator expression x * (x - 1) * 1000 mod {2^32, 2^64}\nproduce zero and skip stddev computation in that case.\n\nFor now don't care about rec->counter * rec->counter overflow because\nrec->time * rec->time overflow will likely happen earlier.","publishedAt":"2025-04-01T15:26:50.211Z","updatedAt":"2026-05-23T15:57:23.790Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f0629ee3922f10112584b1898491fecc74d98b3b","status":"affected","lessThan":"5b3d32f607f0478b414b16516cf27f9170cf66c8","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"ca381f60a3bb7cfaa618d73ca411610bd7fc3149","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"3d738b53ed6cddb68e68c9874520a4bf846163b5","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"992775227843c9376773784b8b362add44592ad7","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"746cc474a95473591853927b3a9792a2d671155b","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6","versionType":"git"},{"version":"e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d","status":"affected","lessThan":"a1a7eb89ca0b89dc1c326eeee2596f263291aca3","versionType":"git"},{"version":"c59e74104cfd7df3ca0b5f59f1baee9c8c28b9ef","status":"affected","versionType":"git"},{"version":"015f0fd0fcc338513f80044add27fa46cf71d217","status":"affected","versionType":"git"},{"version":"1a2985af2a20b816a5cc41a2ddc1c4109ef6b9c6","status":"affected","versionType":"git"},{"version":"7650b4b1df091815bbbbb837d308dd4154684f8a","status":"affected","versionType":"git"},{"version":"010a7e846d4beaf34384c40ff18d5de10106d9b4","status":"affected","versionType":"git"},{"version":"5.4.9","status":"affected","lessThan":"5.4.291","versionType":"semver"},{"version":"3.16.83","status":"affected","lessThan":"3.17","versionType":"semver"},{"version":"4.4.209","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.209","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.163","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.94","status":"affected","lessThan":"4.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ftrace.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.4.291","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.235","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.130","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.81","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.18","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.6","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ftrace.c"]}],"references":["https://git.kernel.org/stable/c/5b3d32f607f0478b414b16516cf27f9170cf66c8","https://git.kernel.org/stable/c/ca381f60a3bb7cfaa618d73ca411610bd7fc3149","https://git.kernel.org/stable/c/3d738b53ed6cddb68e68c9874520a4bf846163b5","https://git.kernel.org/stable/c/992775227843c9376773784b8b362add44592ad7","https://git.kernel.org/stable/c/f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3","https://git.kernel.org/stable/c/746cc474a95473591853927b3a9792a2d671155b","https://git.kernel.org/stable/c/9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6","https://git.kernel.org/stable/c/a1a7eb89ca0b89dc1c326eeee2596f263291aca3","https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"],"weaknesses":["CWE-369"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21898.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21898","state":"PUBLISHED","datePublished":"2025-04-01T15:26:50.211Z","dateUpdated":"2026-05-23T15:57:23.790Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.783Z"},"containers":{"cna":{"title":"ftrace: 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