{"id":"CVE-2026-98687","published":"2026-10-18T16:17:22.097","lastModified":"2026-10-19T10:19:33.103","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Reject oversized XDomain properties responses\n\ntb_xdp_properties_request() allocates room for 45 data dwords in its\n252-byte response buffer.  The XDomain length field is six bits wide,\nhowever, and a malicious peer can set it to 63.  After the fixed response\nfields are subtracted, the driver treats this as 48 data dwords.\n\nCommit 322e93448d90 (\"thunderbolt: Clamp XDomain response data copy to\nallocation size\") only bounds the copy against data_len.  If data_len is\nat least 48, memcpy() reads 192 bytes from the 180-byte res->data array,\ncausing a 12-byte heap out-of-bounds read.  Commit 4db2bd2ed478\n(\"thunderbolt: Limit XDomain response copy to actual frame size\") limits\nthe earlier copy but does not constrain this header-derived length.\n\nReject response data lengths that exceed the allocated source buffer\nbefore copying them into the assembled property block.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa","tags":[]},{"url":"https://git.kernel.org/stable/c/737a1d2e9642d5f718bd29aa4a98b9eef3832f0a","tags":[]},{"url":"https://git.kernel.org/stable/c/80756e263846ab694984e749e8c626897331438f","tags":[]},{"url":"https://git.kernel.org/stable/c/a766a86ff48acee76aeb8e2575771040749e509d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}