PT-2026-52243 · Linux · Linux

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-53147

Mitre

In the Linux kernel, the following vulnerability has been resolved:

thunderbolt: Validate XDomain request packet size before type cast

tb xdp handle request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation.

Plumb the packet length through xdomain request work and validate it against the expected struct size before each cast.

Related Identifiers

CVE-2026-53147

Affected Products

Linux

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-53147 · Security Note
• https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 · Note
• https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39 · Note
• https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057 · Note
• https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b · Note
• https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e · Note
• https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381 · Note