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CVE-2026-98320

HIGHCVSS 7.8/10EPSS 0.22%

Last modified

CVE-2026-98320 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
0.22%

11.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < 93ff1594be1aad4da364462dd8db050ebcfda2de; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < eed6997e8dc40593a539fcc722e7ed51b18db86c; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < 61c6688be282277c6e91ab286a7acd0ae8681ac6; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < a43cd2b67b91e943273c913237a7a88c50cdcfbc; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < 8274cdc5f9c57e17ed77fc4ba76212536c840f25; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < 12c1ac230f4ca16e0017b62a963ab75e0b48074f; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < d9e6175a3ee48209ee65f294fc567b4e16b29b74; >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d
LinuxLinux4.16

References

Timeline

Published
Last Modified
Status
Received

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 severe is CVE-2026-98320?
CVE-2026-98320 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98320?
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