SB20260824156 - Out-of-bounds write in Linux kernel rtl8723bs core driver

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Main Vulnerability Database SB20260824156

SB20260824156 - Out-of-bounds write in Linux kernel rtl8723bs core driver

Published: August 24, 2026

Security Bulletin ID SB20260824156
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-74649)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to write out of bounds or disclose sensitive information.

The vulnerability exists due to out-of-bounds write in the OnAuthClient() shared-key authentication handler when processing a malformed WLAN_EID_CHALLENGE element during shared-key authentication. A remote attacker can send a specially crafted wireless authentication frame to write out of bounds or disclose sensitive information.

The issue is reachable over the air before association.


Remediation

Install update from vendor's website.

References