CVE-2026-98320netfilter: flowtable: hold reference on ct until flow is released
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 13 days later
· 13 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < 93ff1594be1aad4da364462dd8db050ebcfda2de
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < eed6997e8dc40593a539fcc722e7ed51b18db86c
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < 61c6688be282277c6e91ab286a7acd0ae8681ac6
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < a43cd2b67b91e943273c913237a7a88c50cdcfbc
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < 8274cdc5f9c57e17ed77fc4ba76212536c840f25
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < 12c1ac230f4ca16e0017b62a963ab75e0b48074f
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < d9e6175a3ee48209ee65f294fc567b4e16b29b74
- affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a – < e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d
- affected 4.16
- unaffected < 4.16
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.54 – ≤ 6.18.*
- unaffected 7.2.8 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2de (opens in a new tab)
- https://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c (opens in a new tab)
- https://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6 (opens in a new tab)
- https://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbc (opens in a new tab)
- https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25 (opens in a new tab)
- https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074f (opens in a new tab)
- https://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74 (opens in a new tab)
- https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-93305 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98320)Record last updated .