SB20260626191 - Out-of-bounds read in Linux kernel thunderbolt driver

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Main Vulnerability Database SB20260626191

SB20260626191 - Out-of-bounds read in Linux kernel thunderbolt driver

Published: June 26, 2026

Security Bulletin ID SB20260626191
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-53147)

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

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


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in tb_xdp_handle_request() in the thunderbolt xdomain request handler when processing a crafted XDomain request packet that is shorter than the expected protocol-specific structure. A remote attacker can send a minimal crafted XDomain packet to disclose sensitive information.

A generic header length check can be passed even when the packet is too short for the protocol-specific structure accessed after the type cast.


Remediation

Install update from vendor's website.

References