netfilter: nf_conncount: update last_gc only when GC has been performed (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.38 % · percentile 32 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: update last_gc only when GC has been performed Currently last_gc is being updated everytime a new connection is tracked, that means that it is updated even if a GC wasn't performed. With a sufficiently high packet rate, it is possible to always bypass the GC, causing the list to grow infinitely. Update the last_gc value only when a GC has been actually performed.
References
- https://git.kernel.org/stable/c/2c7c71113ed6d3e2f3aca4c088f22283016ff34f
- https://git.kernel.org/stable/c/c4cde57c8affdcca5bcff53a1047e15d268bdca1
- https://git.kernel.org/stable/c/9f45588993d7f115280fc726119ca86fba32a811
- https://git.kernel.org/stable/c/3cd717359e56f82f06cbf8279b47a7d79880c6f3
- https://git.kernel.org/stable/c/26a82dce2beee39c43c109d9647e16f49cb02a35
- https://git.kernel.org/stable/c/8bdafdf4900040a81422056cabe5e00a37bd101a
- https://git.kernel.org/stable/c/7811ba452402d58628e68faedf38745b3d485e3c
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-5898
- GCVE · GCVE-0-2026-23139
CERT-FR advisories
- CERTFR-2026-AVI-1093 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0926 — 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-0787 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0746 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0663 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0638 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0604 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0369 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0329 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.19 < 6.1.161cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.121cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.66cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.6cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected f106694733c66a48740c25bc4e212e9b2ea364ce < 2c7c71113ed6d3e2f3aca4c088f22283016ff34f ; affected be69850b461e7b491d87a22e33ab76fdd04b725e < c4cde57c8affdcca5bcff53a1047e15d268bdca1 ; affected d265929930e2ffafc744c0ae05fb70acd53be1ee < 9f45588993d7f115280fc726119ca86fba32a811 ; affected d265929930e2ffafc744c0ae05fb70acd53be1ee < 3cd717359e56f82f06cbf8279b47a7d79880c6f3 ; affected d265929930e2ffafc744c0ae05fb70acd53be1ee < 26a82dce2beee39c43c109d9647e16f49cb02a35 ; affected d265929930e2ffafc744c0ae05fb70acd53be1ee < 8bdafdf4900040a81422056cabe5e00a37bd101a |
| Linux · Linux | affected 5.19 ; unaffected 0 < 5.19 ; unaffected 6.1.161 ≤ 6.1.* ; unaffected 6.6.121 ≤ 6.6.* ; unaffected 6.12.66 ≤ 6.12.* ; unaffected 6.18.6 ≤ 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 |