netfilter: ipset: make sure gc is properly stopped (CVE-2026-72434) | HOL Guard CVE

High · CVSS 7.8CVE-2026-72434

netfilter: ipset: make sure gc is properly stopped

Answer in brief

CVE-2026-72434 records a High severity (CVSS 7.8) vulnerability in netfilter: ipset: make sure gc is properly stopped. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=f66ee0410b1c3481ee75e5db9b34547b4d582465 <c940d1b96248c3081b664ede5418078bdc7c8c07 \|\| >=f66ee0410b1c3481ee75e5db9b34547b4d582465 <12088da6add5b003657c8506c5b0fcef835083b8 \|\| >=f66ee0410b1c3481ee75e5db9b34547b4d582465 <c78bd5195a5998094a5866df702fbeafda60dafb \|\| >=f66ee0410b1c3481ee75e5db9b34547b4d582465 <4a597a87e2e2f608edb6be2c510dc826b4fdfb53 \|\| 5dd9488ae41070b69d2f4acb580f77db5705f9ca \|\| a469bab3386aebff33c59506f3a95e35b91118fd \|\| >=5.4.24 <5.5 \|\| >=5.5.8 <5.6	c940d1b96248c3081b664ede5418078bdc7c8c07, 12088da6add5b003657c8506c5b0fcef835083b8, c78bd5195a5998094a5866df702fbeafda60dafb, 4a597a87e2e2f608edb6be2c510dc826b4fdfb53, 5.5, 5.6
Linux/Linuxgeneric	5.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to c940d1b96248c3081b664ede5418078bdc7c8c07 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: make sure gc is properly stopped Sashiko noticed that when destroying a set, cancel_delayed_work_sync() was called while gc calls queue_delayed_work() unconditionally which can lead not to properly shutting down the gc.

Quoted source text, attributed separately from HOL analysis.