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Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path nfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue entry from the queue data structures, taking ownership of the entry. For PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN attributes. If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN present but NFQA_VLAN_TCI missing), the function returns immediately without freeing the dequeued entry or its sk_buff. This leaks the nf_queue_entry, its associated sk_buff, and all held references (net_device refcounts, struct net refcount). Repeated triggering exhausts kernel memory. Fix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict on the error path, consistent with other error handling in this file.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-08 | Updated 2026-05-08 | Assigner Linux

Product status

Default status
unaffected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before a907bea273b60d3e604ec4e8e1f6c49954805794
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before 0b18d1b834ab5a5009be70b530f978d7989e445b
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before b38d2b4603fd3dda24eb8b3dd81c18a0930be97b
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before 47b1c5d1b0944aa88299f55a846fabaefc756982
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before cf4a4df38d1747e06fc54f9879bd7a6f4178032f
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before 9853d94b82d303fc4ac37d592a23a154096ecd41
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before 208669df703a25a601f45822b10c413f258bf275
affected

8d45ff22f1b43249f0cf1baafe0262ca10d1666e (git) before f1ba83755d81c6fc66ac7acd723d238f974091e9
affected

Default status
affected

4.7
affected

Any version before 4.7
unaffected

5.10.253 (semver)
unaffected

5.15.203 (semver)
unaffected

6.1.167 (semver)
unaffected

6.6.130 (semver)
unaffected

6.12.78 (semver)
unaffected

6.18.19 (semver)
unaffected

6.19.9 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/a907bea273b60d3e604ec4e8e1f6c49954805794

git.kernel.org/...c/0b18d1b834ab5a5009be70b530f978d7989e445b

git.kernel.org/...c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b

git.kernel.org/...c/47b1c5d1b0944aa88299f55a846fabaefc756982

git.kernel.org/...c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f

git.kernel.org/...c/9853d94b82d303fc4ac37d592a23a154096ecd41

git.kernel.org/...c/208669df703a25a601f45822b10c413f258bf275

git.kernel.org/...c/f1ba83755d81c6fc66ac7acd723d238f974091e9

cve.org (CVE-2026-43451)

nvd.nist.gov (CVE-2026-43451)

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