CVE-2026-53147

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.

Score

CVSS 3.1 8.1 High

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-06-25

Last modified

2026-10-19

Weaknesses

CWE-125

Affected products

• Linux Kernel (Linux)
• Simatic S7-1500 Tm Mfp - Gnulinux Subsystem (Siemens)

References

• https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057
• https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6
• https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e
• https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b
• https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381
• https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html