CVE-2025-37997: debian linux — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix region locking in hash types Region locking introduced in v5.6-rc4 contained three macros to handle the region locks: ahash_bucket_start(), ahash_bucket_end() which gave back the start and end hash bucket values belonging to a given region lock and ahash_region() which should give back the region lock belonging to a given hash bucket. The latter was incorrect which can lead to a race condition between the garbage collector and adding new elements when a hash type of set is defined with timeouts.

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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

Weakness Type (CWE)

CWE-667 CWE-667

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.4.24 — 5.4.294
linux	linux_kernel	5.5.8 — 5.6
linux	linux_kernel	5.6.1 — 5.10.238
linux	linux_kernel	5.11 — 5.15.183
linux	linux_kernel	5.16 — 6.1.139
linux	linux_kernel	6.2 — 6.6.91
linux	linux_kernel	6.7 — 6.12.29
linux	linux_kernel	6.13 — 6.14.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/00cfc5fad1491796942a948808afb968a0a3f35b https://git.kernel.org/stable/c/226ce0ec38316d9e3739e73a64b6b8304646c658 https://git.kernel.org/stable/c/6e002ecc1c8cfdfc866b9104ab7888da54613e59 https://git.kernel.org/stable/c/82c1eb32693bc48251d92532975e19160987e5b9 https://git.kernel.org/stable/c/8478a729c0462273188263136880480729e9efca https://git.kernel.org/stable/c/a3dfec485401943e315c394c29afe2db8f9481d6 https://git.kernel.org/stable/c/aa77294b0f73bb8265987591460cd25b8722c3df https://git.kernel.org/stable/c/e2ab67672b2288521a6146034a971f9a82ffc5c5

Other References

https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Frequently Asked Questions

What is CVE-2025-37997? +

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix region locking in hash types Region locking introduced in v5.6-rc4 contained three macros to handle the region locks: ahash_bucket_start(), ahash_bucket_end() which gave back the start and end hash bucket values belonging to a given region lock and ahash_region() which should give back the region lock belonging to a given hash bucket. The latter was incorrect which can lead to a race condition between the garbage collector and adding new elements when a hash type of set is defined with timeouts. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37997? +

CVE-2025-37997 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-2025-37997? +

CVE-2025-37997 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-2025-37997? +

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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CVE-2025-37997