PT-2026-27683 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-06-05 · CVE-2026-23318

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 A flaw exists in the Linux kernel’s ALSA subsystem related to USB audio handling. Specifically, the validator table for UAC3 AC header descriptors incorrectly uses UAC VERSION 2 instead of UAC VERSION 3. This causes header descriptors from UAC3 devices to bypass validation, potentially leading to out-of-bounds reads when the driver accesses unvalidated descriptor fields. A malicious USB device presenting a crafted header could exploit this issue. The root cause is a copy-paste error during the creation of the UAC3 section from the UAC2 section.

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-2026-23318

ECHO-2171-DE02-CBDE

OESA-2026-2580

OPENSUSE-SU-2026:20826-1

SUSE-SU-2026:1668-1

SUSE-SU-2026:21841-1

SUSE-SU-2026:21845-1

SUSE-SU-2026:21860-1

SUSE-SU-2026:21876-1

SUSE-SU-2026:21877-1

SUSE-SU-2026:21916-1

SUSE-SU-2026:21919-1

SUSE-SU-2026:2217-1

SUSE-SU-2026:2238-1

Affected Products

Linux Kernel

References · 84

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23318.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-31466 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-54285 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23318 · Vendor Advisory
• https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43475 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31778 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43328 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23318 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23107 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43427 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43281 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31678 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31712 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-45984 · Security Note