PT-2026-8134 · Linux+2 · Linux Kernel+2

Published 2025-12-17 · Updated 2026-06-04 · CVE-2026-23139

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel’s netfilter component, specifically within the nf conncount module. The last gc variable is currently updated with each new connection tracked, even if garbage collection (GC) hasn’t been performed. A high packet rate can consistently bypass GC, leading to infinite list growth. The issue involves updating the last gc value only when GC has actually been performed.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2026-07525

CVE-2026-23139

OESA-2026-1760

OPENSUSE-SU-2026:20416-1

RHSA-2026:15883

SUSE-SU-2026:0962-1

SUSE-SU-2026:1081-1

SUSE-SU-2026:20667-1

SUSE-SU-2026:20720-1

SUSE-SU-2026:20838-1

SUSE-SU-2026:20845-1

SUSE-SU-2026:20876-1

SUSE-SU-2026:20931-1

SUSE-SU-2026:21284-1

USN-8278-1

USN-8278-2

USN-8289-1

USN-8289-2

USN-8296-1

USN-8296-2

USN-8393-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 1932

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23139.json · Exploit
• https://ubuntu.com/security/CVE-2026-23078 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-40220 · Security Note
• https://ubuntu.com/security/CVE-2026-23089 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-68354 · Security Note
• https://ubuntu.com/security/CVE-2025-71184 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23135 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23086 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-22997 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31431 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46000 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23156 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23139 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8289-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23163 · Vendor Advisory