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Fencer Vulns
high 7.8

CVE-2025-37997 json

netfilter: ipset: fix region locking in hash types

published 2025-05-29 17 mo ago modified 2026-10-15 24 d ago also EUVD-2025-16383

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

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.

Patch / fix

  • Linux Linux 5.4.294, 5.6, 5.10.238, 5.15.183, 6.1.139, 6.6.91, 6.12.29, 6.14.7, 6.15
  • linux Debian 12 6.1.139-1
  • linux Debian 14, Debian 13 6.12.29-1

debian advisories DEBIAN-CVE-2025-37997

  • linux Ubuntu 22.04 LTS 5.15.0-143.153
  • linux Ubuntu 24.04 LTS 6.8.0-63.66
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1087.94
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1031.33
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1086.95
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1032.34
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1084.90
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1027.31

ubuntu advisories UBUNTU-CVE-2025-37997

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-coco SLE Module for Confidential Computing Technical Preview 15 SP6 6.4.0-15061.28.coco15sp6.1
  • kernel-syms-coco SLE Module for Confidential Computing Technical Preview 15 SP6 6.4.0-15061.28.coco15sp6.1
  • kernel-coco_debug SLE Module for Confidential Computing Technical Preview 15 SP6 6.4.0-15061.28.coco15sp6.1
  • kernel-source-coco SLE Module for Confidential Computing Technical Preview 15 SP6 6.4.0-15061.28.coco15sp6.1
  • dtb-aarch64 openSUSE Leap 15.6 6.4.0-150600.23.60.3
  • kernel-64kb SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 6.4.0-150600.23.60.4
  • kernel-syms SLE Module for Development Tools 15 SP6, openSUSE Leap 15.6 6.4.0-150600.23.60.4
  • kernel-obs-qa openSUSE Leap 15.6 6.4.0-150600.23.60.2

suse advisories SUSE-SU-2025:02923-1SUSE-SU-2025:02538-1SUSE-SU-2025:02537-1SUSE-SU-2025:20498-1SUSE-SU-2025:20483-1SUSE-SU-2025:02335-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-37997 updated cvss 4.7

kernel: netfilter: ipset: fix region locking in hash types

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.