Not yet scoredPublished Oct 18, 2026

CVE-2026-98624netfilter: nfnetlink_queue: hold nfnl mutex in event notifier

Updated under an hour ago (Oct 27, 2026, 7:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: hold nfnl mutex in event notifier We must serialize the release notifier and the config netlink function. A concurrent thread can issue close() which can call the release function while unrelated socket processes UNBIND request for same portid: Oops: general protection fault, [..] RIP: 0010:__instance_destroy+0x60/0x210 [nfnetlink_queue] Call Trace: nfqnl_recv_config+0x9b0/0xdc0 [nfnetlink_queue] nfnetlink_rcv_msg+0x7c2/0xeb0 ? __pfx_nfnetlink_rcv_msg+0x10/0x10 After this, parallel UNBIND and URELEASE events are impossible. This change isn't nice, but its the shortest fix given instances are not refcounted and the nfnetlink config callback drops the rcu read lock early due to need for sleeping allocations.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 18, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb before 46432f2e76f7c385d82506304a2928e7d293289f; from 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb before 597320337c3da06c92a9e95cfc755da66fedc476; 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb builds before 2e9be1302f25c9be51c2fb8c907bc6d8a1050e33; from 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb before d559e06a5ab7c064100aafd5c826eadd0f1c6216; 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb builds before 1d1184411599a7c2217560bab3bbe641c6d03b95; 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb builds before 07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1; from 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb before 8137a39e08e838ced234044384740ceeb99ed388; from 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb before 9461613afc59acef44a0071b0dd5075f6e993ffe	CNA record

References

References

https://git.kernel.org/stable/c/46432f2e76f7c385d82506304a2928e7d293289f
https://git.kernel.org/stable/c/597320337c3da06c92a9e95cfc755da66fedc476
https://git.kernel.org/stable/c/2e9be1302f25c9be51c2fb8c907bc6d8a1050e33
https://git.kernel.org/stable/c/d559e06a5ab7c064100aafd5c826eadd0f1c6216
https://git.kernel.org/stable/c/1d1184411599a7c2217560bab3bbe641c6d03b95
https://git.kernel.org/stable/c/07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1
https://git.kernel.org/stable/c/8137a39e08e838ced234044384740ceeb99ed388
https://git.kernel.org/stable/c/9461613afc59acef44a0071b0dd5075f6e993ffe

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.