CVE-2025-21826
netfilter: nf_tables: reject mismatching sum of field_len with set key length
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory 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
References (11)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Quick Info
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