CVE-2026-53147
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk20th percentile — higher than 20% of all known CVEs
Summary
In the Linux kernel, a vulnerability in the Thunderbolt driver allows out-of-bounds reads because tb_xdp_handle_request() casts received packet buffers to protocol-specific structs without verifying the allocation is large enough. An attacker can send a minimal XDomain packet that passes the generic header length check but is shorter than the target struct.
Risk Assessment
The organization risks sensitive kernel memory disclosure or system instability from a crafted Thunderbolt packet sent remotely.
Recommendation
Immediately update the Linux kernel to a version containing the fix that validates packet size before each cast.
Original NVD description (English source)
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.