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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

Published

2026-10-06

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

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

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