SB20260815141 - Out-of-bounds read in Linux kernel ath wcn36xx driver

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Main Vulnerability Database SB20260815141

SB20260815141 - Out-of-bounds read in Linux kernel ath wcn36xx driver

Published: August 15, 2026

Security Bulletin ID SB20260815141
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

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-2026-74340)

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

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in the wcn36xx_smd_print_reg_info_ind function when processing a firmware PRINT_REG_INFO indication. A remote attacker can provide a firmware-controlled count value that exceeds the actual message data to disclose sensitive information.

The issue occurs because the count field is used as a loop bound for indexing a flexible regs[] array without validation against the received message length.


Remediation

Install update from vendor's website.

References