In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: stop hash:* range iteration at end The following hash set variants: hash:ip,mark hash:ip,port hash:ip,port,ip hash:ip,port,net iterate IPv4 ranges with a 32-bit iterator. The iterator must stop once the last address in the requested range has been processed. Advancing it once more can move the traversal state past the end of the request, so a later retry may continue from an unintended position. Handle the iterator increment explicitly at the end of the loop and stop once the upper bound has been processed. This keeps the existing retry behaviour intact for valid ranges while preventing traversal from continuing past the original boundary.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/02f75f041a93ea045834da89cd3234f4c1d749b4 cve-icon
https://git.kernel.org/stable/c/0b530efb2cc9dbdddfd49d392e3a857f0d4ce8dc cve-icon
https://git.kernel.org/stable/c/0d3a282ab5f165fc207ff49ea5b6ad8f54616bd6 cve-icon
https://git.kernel.org/stable/c/0d7b33ace701fe397e6e4de145f32e098178d901 cve-icon
https://git.kernel.org/stable/c/383418c20e69f5761b6ec5238f599423f4fb77fb cve-icon
https://git.kernel.org/stable/c/952e988163c2ab9939c3db9f0f8e77af6a1bb436 cve-icon
https://git.kernel.org/stable/c/be75218fadea22e59c8673db212f29c681bf45bb cve-icon
https://git.kernel.org/stable/c/c281e018af98df91827d65bec00f4956c00a1b02 cve-icon
https://lore.kernel.org/linux-cve-announce/2026062430-CVE-2026-52921-0628@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-52921 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-52921 cve-icon
History

Thu, 25 Jun 2026 02:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-665
CWE-722

Thu, 25 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-193
References
Metrics threat_severity

None

 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'}

threat_severity

Low

Wed, 24 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-665
CWE-722

Wed, 24 Jun 2026 07:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: stop hash:* range iteration at end The following hash set variants: hash:ip,mark hash:ip,port hash:ip,port,ip hash:ip,port,net iterate IPv4 ranges with a 32-bit iterator. The iterator must stop once the last address in the requested range has been processed. Advancing it once more can move the traversal state past the end of the request, so a later retry may continue from an unintended position. Handle the iterator increment explicitly at the end of the loop and stop once the upper bound has been processed. This keeps the existing retry behaviour intact for valid ranges while preventing traversal from continuing past the original boundary.
Title netfilter: ipset: stop hash:* range iteration at end
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-06-24T07:14:16.533Z

Updated: 2026-06-24T07:14:16.533Z

Reserved: 2026-06-09T07:44:35.367Z

Link: CVE-2026-52921

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-06-24T00:00:00Z

Links: CVE-2026-52921 - Bugzilla