SB2026072096 - Out-of-bounds read in Linux kernel bluetooth

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Main Vulnerability Database SB2026072096

SB2026072096 - Out-of-bounds read in Linux kernel bluetooth

Published: July 20, 2026

Security Bulletin ID SB2026072096
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
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-2026-64126)

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

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in the Bluetooth MGMT add_ext_adv_data() handler when processing a crafted MGMT_OP_ADD_EXT_ADV_DATA command with inconsistent length fields. A local privileged user can send a specially crafted management command to disclose sensitive information.

Exploitation requires CAP_NET_ADMIN in the initial user namespace, and exposed memory may be read back via MGMT_OP_GET_ADV_INSTANCE.


Remediation

Install update from vendor's website.

References