CVE-2025-21898
ftrace: Avoid potential division by zero in function_stat_show()
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: ftrace: Avoid potential division by zero in function_stat_show() Check whether denominator expression x * (x - 1) * 1000 mod {2^32, 2^64} produce zero and skip stddev computation in that case. For now don't care about rec->counter * rec->counter overflow because rec->time * rec->time overflow will likely happen earlier.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 1, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
f0629ee3922f10112584b1898491fecc74d98b3b < 5b3d32f607f0478b414b16516cf27f9170cf66c8 e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < ca381f60a3bb7cfaa618d73ca411610bd7fc3149 e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < 3d738b53ed6cddb68e68c9874520a4bf846163b5 e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < 992775227843c9376773784b8b362add44592ad7 e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3 e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < 746cc474a95473591853927b3a9792a2d671155b e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < 9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6 e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d < a1a7eb89ca0b89dc1c326eeee2596f263291aca3 c59e74104cfd7df3ca0b5f59f1baee9c8c28b9ef 015f0fd0fcc338513f80044add27fa46cf71d217 1a2985af2a20b816a5cc41a2ddc1c4109ef6b9c6 7650b4b1df091815bbbbb837d308dd4154684f8a 010a7e846d4beaf34384c40ff18d5de10106d9b4
Linux / Linux
5.5
References
git.kernel.org: https://git.kernel.org/stable/c/5b3d32f607f0478b414b16516cf27f9170cf66c8 git.kernel.org: https://git.kernel.org/stable/c/ca381f60a3bb7cfaa618d73ca411610bd7fc3149 git.kernel.org: https://git.kernel.org/stable/c/3d738b53ed6cddb68e68c9874520a4bf846163b5 git.kernel.org: https://git.kernel.org/stable/c/992775227843c9376773784b8b362add44592ad7 git.kernel.org: https://git.kernel.org/stable/c/f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3 git.kernel.org: https://git.kernel.org/stable/c/746cc474a95473591853927b3a9792a2d671155b git.kernel.org: https://git.kernel.org/stable/c/9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6 git.kernel.org: https://git.kernel.org/stable/c/a1a7eb89ca0b89dc1c326eeee2596f263291aca3 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html