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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-25)

CWE

CWE-667

Published

2025-05-29

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• linux:linux_kernel

References

• 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

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