netfilter: flowtable: hold reference on ct until flow is released (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.14 % · percentile 3 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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.
References
- https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2de
- https://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c
- https://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6
- https://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbc
- https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25
- https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074f
- https://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74
- https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-93305
- GCVE · GCVE-0-2026-98320
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1374 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1373 — Multiples vulnérabilités dans les produits Red Hat · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 93ff1594be1aad4da364462dd8db050ebcfda2de ; affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a < eed6997e8dc40593a539fcc722e7ed51b18db86c ; affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 61c6688be282277c6e91ab286a7acd0ae8681ac6 ; affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a < a43cd2b67b91e943273c913237a7a88c50cdcfbc ; affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 8274cdc5f9c57e17ed77fc4ba76212536c840f25 ; affected 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 12c1ac230f4ca16e0017b62a963ab75e0b48074f |
| Linux · Linux | affected 4.16 ; unaffected 0 < 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.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |