Bug 2464461 (CVE-2026-43024)

Summary: CVE-2026-43024 kernel: netfilter: nf_tables: reject immediate NF_QUEUE verdict
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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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A flaw was found in the Linux kernel's netfilter nf_tables component. This vulnerability arises from the system allowing immediate NF_QUEUE verdicts, which are not intended for use by userspace nft tools. This could lead to unexpected behavior or a bypass of intended network filtering rules, potentially impacting system stability or security policies.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-01 15:08:06 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: reject immediate NF_QUEUE verdict

nft_queue is always used from userspace nftables to deliver the NF_QUEUE
verdict. Immediately emitting an NF_QUEUE verdict is never used by the
userspace nft tools, so reject immediate NF_QUEUE verdicts.

The arp family does not provide queue support, but such an immediate
verdict is still reachable. Globally reject NF_QUEUE immediate verdicts
to address this issue.
Comment 1 Keith Grant 2026-05-01 17:03:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050159-CVE-2026-43024-9383@gregkh/T