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CVE-2026-98624

Unknown

Last modified

CVE-2026-98624 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 46432f2e76f7c385d82506304a2928e7d293289f; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 597320337c3da06c92a9e95cfc755da66fedc476; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 2e9be1302f25c9be51c2fb8c907bc6d8a1050e33; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < d559e06a5ab7c064100aafd5c826eadd0f1c6216; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 1d1184411599a7c2217560bab3bbe641c6d03b95; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 8137a39e08e838ced234044384740ceeb99ed388; >= 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb, < 9461613afc59acef44a0071b0dd5075f6e993ffe
LinuxLinux2.6.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98624?
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.
How severe is CVE-2026-98624?
Severity scoring for CVE-2026-98624 is pending analysis.
How do I fix CVE-2026-98624?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST