{"schema":"threatline.record/2","record":{"id":"CVE-2026-98687","aliases":[],"summary":"thunderbolt: Reject oversized XDomain properties responses","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","source_modified_at":"2026-10-21T12:55:42.401Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"d1ff70241a275133e1a0258b7c23588b122276c8","lessThan":"b270c1074860de74da0d6b5250fb06b359b9d509","status":"affected","versionType":"git"},{"version":"d1ff70241a275133e1a0258b7c23588b122276c8","lessThan":"a766a86ff48acee76aeb8e2575771040749e509d","status":"affected","versionType":"git"},{"version":"d1ff70241a275133e1a0258b7c23588b122276c8","lessThan":"2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa","status":"affected","versionType":"git"},{"version":"d1ff70241a275133e1a0258b7c23588b122276c8","lessThan":"737a1d2e9642d5f718bd29aa4a98b9eef3832f0a","status":"affected","versionType":"git"},{"version":"d1ff70241a275133e1a0258b7c23588b122276c8","lessThan":"80756e263846ab694984e749e8c626897331438f","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","source_modified_at":"2026-10-21T12:55:42.401Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.15","status":"affected"},{"version":"0","lessThan":"4.15","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","source_modified_at":"2026-10-21T12:55:42.401Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","source_modified_at":"2026-10-21T12:55:42.401Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"737a1d2e9642d5f718bd29aa4a98b9eef3832f0a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","source_modified_at":"2026-10-21T12:55:42.401Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"80756e263846ab694984e749e8c626897331438f","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05714,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:45:58.719Z","modified_at":"2026-10-21T12:55:42.401Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:55:42.401Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98687","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/b270c1074860de74da0d6b5250fb06b359b9d509"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a766a86ff48acee76aeb8e2575771040749e509d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/737a1d2e9642d5f718bd29aa4a98b9eef3832f0a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/80756e263846ab694984e749e8c626897331438f"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:55:42.401Z","content_hash":"4562776ee7a43d317b0a28ee0829292b93694d8e600f4d8ef3fc4e86bbe53e7a"}}