High 7.8Published May 29, 2025

CVE-2025-37997netfilter: ipset: fix region locking in hash types

Updated under an hour ago (Oct 27, 2026, 2:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	5dd9488ae41070b69d2f4acb580f77db5705f9ca builds before 00cfc5fad1491796942a948808afb968a0a3f35b; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before 226ce0ec38316d9e3739e73a64b6b8304646c658; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before 82c1eb32693bc48251d92532975e19160987e5b9; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before aa77294b0f73bb8265987591460cd25b8722c3df; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before a3dfec485401943e315c394c29afe2db8f9481d6; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before e2ab67672b2288521a6146034a971f9a82ffc5c5; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before 6e002ecc1c8cfdfc866b9104ab7888da54613e59; from f66ee0410b1c3481ee75e5db9b34547b4d582465 before 8478a729c0462273188263136880480729e9efca; and 3 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 5.4.24 before 5.4.294; from 5.5.8 before 5.6; from 5.6.1 before 5.10.238; from 5.11 before 5.15.183; from 5.16 before 6.1.139; from 6.2 before 6.6.91; from 6.7 before 6.12.29; from 6.13 before 6.14.7; and 10 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/00cfc5fad1491796942a948808afb968a0a3f35b	patch
https://git.kernel.org/stable/c/226ce0ec38316d9e3739e73a64b6b8304646c658	patch
https://git.kernel.org/stable/c/82c1eb32693bc48251d92532975e19160987e5b9	patch
https://git.kernel.org/stable/c/aa77294b0f73bb8265987591460cd25b8722c3df	patch
https://git.kernel.org/stable/c/a3dfec485401943e315c394c29afe2db8f9481d6	patch
https://git.kernel.org/stable/c/e2ab67672b2288521a6146034a971f9a82ffc5c5	patch
https://git.kernel.org/stable/c/6e002ecc1c8cfdfc866b9104ab7888da54613e59	patch
https://git.kernel.org/stable/c/8478a729c0462273188263136880480729e9efca	patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html	third-party-advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.