netfilter: nf_tables: unconditionally bump set->nelems before insertion (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.17 % · percentile 6 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: unconditionally bump set->nelems before insertion In case that the set is full, a new element gets published then removed without waiting for the RCU grace period, while RCU reader can be walking over it already. To address this issue, add the element transaction even if set is full, but toggle the set_full flag to report -ENFILE so the abort path safely unwinds the set to its previous state. As for element updates, decrement set->nelems to restore it. A simpler fix is to call synchronize_rcu() in the error path. However, with a large batch adding elements to already maxed-out set, this could cause noticeable slowdown of such batches.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/25fcaef7948912652905e96922f36583a84fffed
- https://git.kernel.org/stable/c/e3ccb11fc8249759d23326038c8db987ddaabc77
- https://git.kernel.org/stable/c/86bc4b1a0f672d47ac19f9022432cb6a2e01cb33
- https://git.kernel.org/stable/c/6826131c7674329335ca25df2550163eb8a1fd0c
- https://git.kernel.org/stable/c/ccb8c8f3c1127cf34d18c737309897c68046bf21
- https://git.kernel.org/stable/c/def602e498a4f951da95c95b1b8ce8ae68aa733a
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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-2026-13607
- GCVE · GCVE-0-2026-23272
CERT-FR advisories
- CERTFR-2026-AVI-1298 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1027 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0957 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0929 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0926 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0898 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0861 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0831 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0809 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0546 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0520 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0497 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0454 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9.33 < 4.10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10.1 < 6.18.17cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 6.19.7cpe:2.3:o:linux:linux_kernel:4.10:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:4.10:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:4.10:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:4.10:rc8:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 35d0ac9070ef619e3bf44324375878a1c540387b < 25fcaef7948912652905e96922f36583a84fffed ; affected 35d0ac9070ef619e3bf44324375878a1c540387b < e3ccb11fc8249759d23326038c8db987ddaabc77 ; affected 35d0ac9070ef619e3bf44324375878a1c540387b < 86bc4b1a0f672d47ac19f9022432cb6a2e01cb33 ; affected 35d0ac9070ef619e3bf44324375878a1c540387b < 6826131c7674329335ca25df2550163eb8a1fd0c ; affected 35d0ac9070ef619e3bf44324375878a1c540387b < ccb8c8f3c1127cf34d18c737309897c68046bf21 ; affected 35d0ac9070ef619e3bf44324375878a1c540387b < def602e498a4f951da95c95b1b8ce8ae68aa733a |
| Linux · Linux | affected 4.10 ; unaffected 0 < 4.10 ; unaffected 6.1.177 ≤ 6.1.* ; unaffected 6.6.141 ≤ 6.6.* ; unaffected 6.12.91 ≤ 6.12.* ; unaffected 6.18.17 ≤ 6.18.* |
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 |