SB2026050251 - Improper input validation in Linux kernel bluetooth

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Main Vulnerability Database SB2026050251

SB2026050251 - Improper input validation in Linux kernel bluetooth

Published: May 2, 2026

Security Bulletin ID SB2026050251
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) Improper input validation (CVE-ID: CVE-2026-43017)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to improper input validation in the Bluetooth MGMT mesh send handler when processing a crafted MGMT_OP_MESH_SEND command. A local user can send a specially crafted command with a truncated advertising payload length to cause a denial of service.

The issue arises because the supplied flexible adv_data[] array bytes may not match the embedded adv_data_len field, allowing the async mesh send path to read past the end of the queued command buffer.


Remediation

Install update from vendor's website.

References