CVE-2026-53147

Description

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.

CVSS breakdown

Affected products

• Linux / Linuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 – a770e62923090d7572f1f5a8507ae551d354a057
• Linux / Linuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 – 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6
• Linux / Linuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 – 79235c8add5da4bf27a12f5a5dbb579f300c059e
• Linux / Linuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 – 46da5c3ea011e884028a91cf913db093920a915b
• Linux / Linuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 – 07cd2787cdf8942d24a1a3ef81aa89b526fb6381
• Linux / Linuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 – a504b9f2797b739e0304d537e8aa4ce883ecce39
• Linux / Linux4.15 – 4.15
• Linux / Linux0 – 4.15
• Linux / Linux6.1.176 – 6.1.*
• Linux / Linux6.6.143 – 6.6.*
• Linux / Linux6.12.94 – 6.12.*
• Linux / Linux6.18.36 – 6.18.*
• Linux / Linux7.0.13 – 7.0.*
• Linux / Linux7.1 – *

References

• MISChttps://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057
• MISChttps://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6
• MISChttps://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e
• MISChttps://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b
• MISChttps://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381
• MISChttps://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39