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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ipset中的区域锁定不正确，可能导致竞争条件。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 21

VendorProduct Version RangeStatus
Linux Linux 5dd9488ae41070b69d2f4acb580f77db5705f9ca< 00cfc5fad1491796942a948808afb968a0a3f35b affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< 226ce0ec38316d9e3739e73a64b6b8304646c658 affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< 82c1eb32693bc48251d92532975e19160987e5b9 affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< aa77294b0f73bb8265987591460cd25b8722c3df affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< a3dfec485401943e315c394c29afe2db8f9481d6 affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< e2ab67672b2288521a6146034a971f9a82ffc5c5 affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< 6e002ecc1c8cfdfc866b9104ab7888da54613e59 affected
f66ee0410b1c3481ee75e5db9b34547b4d582465< 8478a729c0462273188263136880480729e9efca affected
… +13 more rows
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I. Basic Information for CVE-2025-37997

Vulnerability Information
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Vulnerability Title
netfilter: ipset: fix region locking in hash types
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ipset中的区域锁定不正确，可能导致竞争条件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5dd9488ae41070b69d2f4acb580f77db5705f9ca ~ 00cfc5fad1491796942a948808afb968a0a3f35b -
Linux Linux 5.6 -

II. Public POCs for CVE-2025-37997

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III. Intelligence Information for CVE-2025-37997

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Patches & Fixes for CVE-2025-37997 (2)

Same Patch Batch · Linux · 2025-05-29 · 7 CVEs total

CVE-2025-37996 8.8 HIGH KVM: arm64: Fix uninitialized memcache pointer in user_mem_abort()
CVE-2025-37998 7.8 HIGH openvswitch: Fix unsafe attribute parsing in output_userspace()
CVE-2025-37999 fs/erofs/fileio: call erofs_onlinefolio_split() after bio_add_folio()
CVE-2025-37995 module: ensure that kobject_put() is safe for module type kobjects
CVE-2025-37994 usb: typec: ucsi: displayport: Fix NULL pointer access
CVE-2025-37993 can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-37997

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