CVE-2025-38120: debian linux — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.15.165 — 5.15.186
linux	linux_kernel	6.1.103 — 6.1.142
linux	linux_kernel	6.6.44 — 6.6.94
linux	linux_kernel	6.10.3 — 6.12.34
linux	linux_kernel	6.13 — 6.15.3
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/251496ce1728c9fd47bd2b20a7b21b20b9a020ca https://git.kernel.org/stable/c/39bab2d3517b5b50c609b4f8c66129bf619fffa0 https://git.kernel.org/stable/c/8068e1e42b46518ce680dc6470bcd710efc3fa0a https://git.kernel.org/stable/c/8164d0efaf370c425dc69a1e8216940d09e7de0c https://git.kernel.org/stable/c/90bc7f5a244aadee4292b28098b7c98aadd4b3aa https://git.kernel.org/stable/c/b5ad58285f9217d68cd5ea2ad86ce254a3fe7c4d https://git.kernel.org/stable/c/ea77c397bff8b6d59f6d83dae1425b08f465e8b5

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Frequently Asked Questions

What is CVE-2025-38120? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38120? +

CVE-2025-38120 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-38120? +

CVE-2025-38120 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-38120? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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