---
cve: "CVE-2026-23139"
severity: "HIGH"
cvss: 7.5
epss: "33%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-02-14 16:15:53"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T11:42:14+02:00"
---

# CVE-2026-23139

> 7.5 HIGH

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 6.1.161
- Kernel ≥ 6.6.121
- Kernel ≥ 6.12.66
- Kernel ≥ 6.18.6

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-23139) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_