Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_set_pipapo_avx2: fix initial map fill If the first field doesn't cover the entire start map, then we must zero out the remainder, else we leak those bits into the next match round map. The early fix was incomplete and did only fix up the generic C implementation. A followup patch adds a test case to nft_concat_range.sh.
Affected products
linux: linux kernel; debian: debian linux
References8
- git.kernel.org/stable/c/251496ce1728c9fd47bd2b20a7b21b20b9a020ca Patch
- git.kernel.org/stable/c/39bab2d3517b5b50c609b4f8c66129bf619fffa0 Patch
- git.kernel.org/stable/c/8068e1e42b46518ce680dc6470bcd710efc3fa0a Patch
- git.kernel.org/stable/c/8164d0efaf370c425dc69a1e8216940d09e7de0c Patch
- git.kernel.org/stable/c/90bc7f5a244aadee4292b28098b7c98aadd4b3aa Patch
- git.kernel.org/stable/c/b5ad58285f9217d68cd5ea2ad86ce254a3fe7c4d Patch
- git.kernel.org/stable/c/ea77c397bff8b6d59f6d83dae1425b08f465e8b5 Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 45 · as of 7 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.