CVE-2026-98624None▾ SunlitIn 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 clo…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
0.2% → 0.2%
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.
Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 46432f2e76f7c385d82506304a2928e7d293289fLinux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 597320337c3da06c92a9e95cfc755da66fedc476Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 2e9be1302f25c9be51c2fb8c907bc6d8a1050e33Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < d559e06a5ab7c064100aafd5c826eadd0f1c6216Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 1d1184411599a7c2217560bab3bbe641c6d03b95Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 8137a39e08e838ced234044384740ceeb99ed388Linux >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb < 9461613afc59acef44a0071b0dd5075f6e993ffeLinux 2.6.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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