SB2026072837 - Stack-based buffer overflow in Linux kernel bluetooth

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Main Vulnerability Database SB2026072837

SB2026072837 - Stack-based buffer overflow in Linux kernel bluetooth

Published: July 28, 2026

Security Bulletin ID SB2026072837
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Stack-based buffer overflow (CVE-ID: CVE-2026-64539)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a stack-based buffer overflow in eir_create_adv_data() in the Bluetooth EIR advertising data builder when constructing legacy advertising data for an LE-only controller. A local user can supply crafted advertising instance data to trigger a stack out-of-bounds write and cause a denial of service.

Exploitation requires CAP_NET_ADMIN and access to the legacy advertising path on an LE-only controller.


Remediation

Install update from vendor's website.

References