CVE-2026-98320
Published Oct 6, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period. Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.
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EPSS — Exploit Prediction
0.0022
Probability of exploitation
0.11%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other References
https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074f
https://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6
https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25
https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2de
https://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbc
https://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74
https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d
https://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c
Frequently Asked Questions
What is CVE-2026-98320? +
In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: hold reference on ct until flow is released
nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe
semantics also allow to refer to the wrong conntrack from the flowtable
datapath. Hold reference on ct until flow is released after rcu grace
period.
Add rcu_barrier() on module exit path, to ensure pending flow entries
are release before module goes away.
How do I check if I'm vulnerable to CVE-2026-98320? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.