CVE-2026-98320
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux
PublishedOct 6, 2026
First seenOct 6, 2026
How to fix
Update
- Linux Linux93ff1594be1aad4da364462dd8db050ebcfda2de, eed6997e8dc40593a539fcc722e7ed51b18db86c, 61c6688be282277c6e91ab286a7acd0ae8681ac6, a43cd2b67b91e943273c913237a7a88c50cdcfbc, 8274cdc5f9c57e17ed77fc4ba76212536c840f25, 12c1ac230f4ca16e0017b62a963ab75e0b48074f, d9e6175a3ee48209ee65f294fc567b4e16b29b74, e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < 93ff1594be1aad4da364462dd8db050ebcfda2de, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < eed6997e8dc40593a539fcc722e7ed51b18db86c, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < 61c6688be282277c6e91ab286a7acd0ae8681ac6, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < a43cd2b67b91e943273c913237a7a88c50cdcfbc, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < 8274cdc5f9c57e17ed77fc4ba76212536c840f25, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < 12c1ac230f4ca16e0017b62a963ab75e0b48074f, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < d9e6175a3ee48209ee65f294fc567b4e16b29b74, 0ff90b6c20340e57616a51ae1a1bf18156d6638a ≤ v < e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d, 4.16 | 93ff1594be1aad4da364462dd8db050ebcfda2de, eed6997e8dc40593a539fcc722e7ed51b18db86c, 61c6688be282277c6e91ab286a7acd0ae8681ac6, a43cd2b67b91e943273c913237a7a88c50cdcfbc, 8274cdc5f9c57e17ed77fc4ba76212536c840f25, 12c1ac230f4ca16e0017b62a963ab75e0b48074f, d9e6175a3ee48209ee65f294fc567b4e16b29b74, e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d |
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