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.
Published: 2025-05-29
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4271-1 linux-6.1 security update
Debian DLA Debian DLA DLA-4327-1 linux security update
EUVD EUVD EUVD-2025-16383 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.
Ubuntu USN Ubuntu USN USN-7608-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-3 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-4 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-5 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-6 Linux kernel (Xilinx ZynqMP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-7 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-3 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-4 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-5 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7610-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7610-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7610-3 Linux kernel (Low Latency) vulnerabilities
Ubuntu USN Ubuntu USN USN-7611-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7611-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7611-3 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7611-4 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-7618-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7628-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7653-1 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7655-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-7665-2 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7671-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7671-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7671-3 Linux kernel (IoT) vulnerabilities
Ubuntu USN Ubuntu USN USN-7686-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7712-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7712-2 Linux kernel (Azure) vulnerabilities
History

Tue, 16 Dec 2025 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Debian
Debian debian Linux
Weaknesses CWE-667
CPEs cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.6:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
Vendors & Products Debian
Debian debian Linux
Metrics cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


Mon, 03 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

Mon, 03 Nov 2025 18:30:00 +0000

Type Values Removed Values Added
References

Wed, 04 Jun 2025 13:00:00 +0000


Fri, 30 May 2025 21:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate


Thu, 29 May 2025 13:30:00 +0000

Type Values Removed Values Added
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.
Title netfilter: ipset: fix region locking in hash types
References

Subscriptions

Debian Debian Linux
Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-11T21:19:18.950Z

Reserved: 2025-04-16T04:51:23.976Z

Link: CVE-2025-37997

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2025-05-29T14:15:36.317

Modified: 2025-12-16T20:20:41.413

Link: CVE-2025-37997

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-05-29T00:00:00Z

Links: CVE-2025-37997 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-06-24T09:44:22Z

Weaknesses