SB20260727131 - Out-of-bounds read in Linux kernel rtl8723bs core driver

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Main Vulnerability Database SB20260727131

SB20260727131 - Out-of-bounds read in Linux kernel rtl8723bs core driver

Published: July 27, 2026

Security Bulletin ID SB20260727131
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-64443)

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

CVSSv4: 5.3 [CVSS:4.0/AV:A/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 an out-of-bounds read in the update_beacon_info() IE parsing loop in rtl8723bs when parsing a crafted Beacon frame from a malicious access point. A remote attacker can send a specially crafted Beacon frame to disclose sensitive information.

The issue can be triggered when the last information element is truncated or when an information element declares a length that extends past the available frame data.


Remediation

Install update from vendor's website.

References