CVE-2026-53147

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 < a770e62923090d7572f1f5a8507ae551d354a057affected
LinuxLinuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 < 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6affected
LinuxLinuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 < 79235c8add5da4bf27a12f5a5dbb579f300c059eaffected
LinuxLinuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 < 46da5c3ea011e884028a91cf913db093920a915baffected
LinuxLinuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 < 07cd2787cdf8942d24a1a3ef81aa89b526fb6381affected
LinuxLinuxcdae7c07e3e3509eaabc18c1640a55dc5b99c179 < a504b9f2797b739e0304d537e8aa4ce883ecce39affected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References