Bug 2516290 (CVE-2026-72434)

Summary: CVE-2026-72434 kernel: netfilter: ipset: make sure gc is properly stopped
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's netfilter ipset component. When destroying a set, the garbage collection (gc) mechanism may not be properly stopped due to an unconditional call to `queue_delayed_work()` while `cancel_delayed_work_sync()` is called. This improper shutdown can lead to resource exhaustion, potentially resulting in a Denial of Service (DoS) condition.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-08-15 06:04:45 UTC
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.