CVE-2026-98624: Linux kernel · netfilter: nfnetlink_queue: hold nfnl mutex in event notifier
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d559e06a5ab7c064100aafd5c826eadd0f1c6216 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in d559e06a5ab7c064100aafd5c826eadd0f1c6216, 597320337c3da06c92a9e95cfc755da66fedc476, 9461613afc59acef44a0071b0dd5075f6e993ffe +5
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available and has been applied in the Linux kernel versions identified by the provided commit hashes. Users should update to a Linux kernel version that includes these fixes. No additional mitigation is required beyond applying the official patch.
Description
A concurrency issue in the Linux kernel's netfilter nfnetlink_queue subsystem was fixed by ensuring the nfnl mutex is held in the event notifier. This prevents parallel UNBIND and URELEASE events that could cause a general protection fault (kernel crash). The fix serializes release notifier and config netlink functions to avoid race conditions during socket close and unbind operations.
References
- git.kernel.org/stable/c/46432f2e76f7c385d82506304a2928e7d293289f (opens in a new tab)
- git.kernel.org/stable/c/597320337c3da06c92a9e95cfc755da66fedc476 (opens in a new tab)
- git.kernel.org/stable/c/2e9be1302f25c9be51c2fb8c907bc6d8a1050e33 (opens in a new tab)
- git.kernel.org/stable/c/d559e06a5ab7c064100aafd5c826eadd0f1c6216 (opens in a new tab)
- git.kernel.org/stable/c/1d1184411599a7c2217560bab3bbe641c6d03b95 (opens in a new tab)
- git.kernel.org/stable/c/07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1 (opens in a new tab)
- git.kernel.org/stable/c/8137a39e08e838ced234044384740ceeb99ed388 (opens in a new tab)
- git.kernel.org/stable/c/9461613afc59acef44a0071b0dd5075f6e993ffe (opens in a new tab)