PT-2026-6134 · Linux+2 · Linux Kernel+2

Syzbot · Published 2026-01-01 · Updated 2026-05-22 · CVE-2026-23064

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description The Linux kernel contains a flaw within the networking subsystem, specifically in the net/sched component related to the act ife functionality. The issue arises from a potential NULL dereference in the tcf ife encode() function if ife encode() returns NULL. This can lead to a general protection fault, as reported by the syzbot fuzzer. The vulnerability is located in the ife tlv meta encode function within the net/ife/ife.c file.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-23064

ECHO-F3D4-6179-BC21

OPENSUSE-SU-2026:20416-1

SUSE-SU-2026:0962-1

SUSE-SU-2026:1078-1

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-8162-1

USN-8180-1

USN-8180-2

USN-8180-3

USN-8180-4

USN-8180-5

USN-8180-6

USN-8186-1

USN-8187-1

USN-8188-1

USN-8243-1

USN-8275-1

USN-8278-1

USN-8289-1

USN-8296-1

USN-8297-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 2183

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23064.json · Exploit
• https://ubuntu.com/security/CVE-2026-23083 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71137 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40055 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68813 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23148 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40030 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23123 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40149 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23032 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23209 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40194 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71111 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40219 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8180-5 · Vendor Advisory