CVE-2026-23139

HIGH

Linux Kernel 5.19.0-6.1.160, 6.2.0-6.6.120, 6.7.0-6.12.65, 6.13.0-6.18.5 - Denial of Service via nf_conncount GC Bypass

Title source: llm
STIX 2.1

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 (7)

Core 7

Scores

CVSS v3 7.5
EPSS 0.0004
EPSS Percentile 10.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (20)
linux/Kernel 5.19.0 - 6.1.161linux
linux/Kernel 6.13.0 - 6.18.6linux
linux/Kernel 6.2.0 - 6.6.121linux
linux/Kernel 6.7.0 - 6.12.66linux
Linux/Linux < 5.19
Linux/Linux 5.19
Linux/Linux 6.1.161 - 6.1.*
Linux/Linux 6.12.66 - 6.12.*
Linux/Linux 6.18.6 - 6.18.*
Linux/Linux 6.19
... and 10 more
Published Feb 14, 2026
Tracked Since Feb 18, 2026