SB2026072770 - Out-of-bounds read in Linux kernel usb caiaq

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Main Vulnerability Database SB2026072770

SB2026072770 - Out-of-bounds read in Linux kernel usb caiaq

Published: July 27, 2026

Security Bulletin ID SB2026072770
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-64487)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to out-of-bounds read in snd_usb_caiaq_tks4_dispatch() when parsing input from a crafted USB device input stream. An attacker with physical access can provide a malformed short final message block to cause a denial of service.

The issue is triggered because the device-controlled input length is not guaranteed to be a multiple of the 16-byte message block size, leading to an unsigned underflow during iteration.


Remediation

Install update from vendor's website.

References