CVE-2026-98687
Description
In the Linux kernel, the following vulnerability has been resolved:
thunderbolt: Reject oversized XDomain properties responses
tb_xdp_properties_request() allocates room for 45 data dwords in its
252-byte response buffer. The XDomain length field is six bits wide,
however, and a malicious peer can set it to 63. After the fixed response
fields are subtracted, the driver treats this as 48 data dwords.
Commit 322e93448d90 ('thunderbolt: Clamp XDomain response data copy to
allocation size') only bounds the copy against data_len. If data_len is
at least 48, memcpy() reads 192 bytes from the 180-byte res->data array,
causing a 12-byte heap out-of-bounds read. Commit 4db2bd2ed478
('thunderbolt: Limit XDomain response copy to actual frame size') limits
the earlier copy but does not constrain this header-derived length.
Reject response data lengths that exceed the allocated source buffer
before copying them into the assembled property block.
EPSS (Exploit Prediction Scoring System)
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.