CVE-2025-21826
Published: March 7, 2025Last modified: March 7, 2025
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject mismatching sum of field_len with set key length The field length description provides the length of each separated key field in the concatenation, each field gets rounded up to 32-bits to calculate the pipapo rule width from pipapo_init(). The set key length provides the total size of the key aligned to 32-bits. Register-based arithmetics still allows for combining mismatching set key length and field length description, eg. set key length 10 and field description [ 5, 4 ] leading to pipapo width of 12.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.130-r0) |
| 25 LTS | linux-lts | Fixed (6.12.41-r0) | |
| Stream | linux-lts | Fixed (6.12.41-r0) |
References
- https://git.kernel.org/stable/c/1b9335a8000fb70742f7db10af314104b6ace220
- https://git.kernel.org/stable/c/2ac254343d3cf228ae0738b2615fedf85d000752
- https://git.kernel.org/stable/c/49b7182b97bafbd5645414aff054b4a65d05823d
- https://git.kernel.org/stable/c/5083a7ae45003456c253e981b30a43f71230b4a3
- https://git.kernel.org/stable/c/6b467c8feac759f4c5c86d708beca2aa2b29584f
- https://git.kernel.org/stable/c/82e491e085719068179ff6a5466b7387cc4bbf32
- https://git.kernel.org/stable/c/ab50d0eff4a939d20c37721fd9766347efcdb6f6
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html