PT-2026-6146 · Linux+2 · Linux Kernel+2

Published 2026-01-01 · Updated 2026-05-26 · CVE-2026-23076

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description The ctxfi driver in the Linux kernel contains a flaw in the audio mixer handling code. The conf field, used as a loop index, is not properly initialized, leading to potential out-of-bounds (OOB) access when called by the amixer index() and sum index() functions. This issue was identified through fuzzing and results in a UBSAN error indicating an out-of-bounds access on an unsigned char [8] array. The root cause is the missing re-initialization of the conj field.

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

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-23076

ECHO-BB38-CE24-FABE

OPENSUSE-SU-2026:20416-1

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-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-8278-2

USN-8289-1

USN-8289-2

USN-8296-1

USN-8296-2

USN-8297-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 2162

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23076.json · Exploit
• https://git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38 · Patch
• https://ubuntu.com/security/CVE-2025-40088 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23112 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68200 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23213 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23010 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40043 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68728 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40110 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68308 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40087 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68372 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23113 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23076 · Security Note