CVE-2025-21898
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…
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.23% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-369
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3d738b53ed6cddb68e68c9874520a4bf846163b5Patch
- https://git.kernel.org/stable/c/5b3d32f607f0478b414b16516cf27f9170cf66c8Patch
- https://git.kernel.org/stable/c/746cc474a95473591853927b3a9792a2d671155bPatch
- https://git.kernel.org/stable/c/992775227843c9376773784b8b362add44592ad7Patch
- https://git.kernel.org/stable/c/9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6Patch
- https://git.kernel.org/stable/c/a1a7eb89ca0b89dc1c326eeee2596f263291aca3Patch
- https://git.kernel.org/stable/c/ca381f60a3bb7cfaa618d73ca411610bd7fc3149Patch
- https://git.kernel.org/stable/c/f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.