Out-of-bounds read in Linux kernel - CVE-2026-53147
Published: June 26, 2026
Vulnerability identifier: #VU135631
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2026-53147
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-53147
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381
- https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6
- https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b
- https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e
- https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39
- https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057