{"id":"CVE-2026-53147","revision":null,"records":[{"revision":"ad24ba95e50943d087bc8e5331909187","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53147","aliases":[],"title":"thunderbolt: Validate XDomain request packet size before type cast","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Validate XDomain request packet size before type cast\n\ntb_xdp_handle_request() casts the received packet buffer to\nprotocol-specific structs without verifying that the allocation\nis large enough for the target type. A peer can send a minimal\nXDomain packet that passes the generic header length check but is\nshorter than the struct accessed after the cast, causing out-of-\nbounds reads from the kmemdup allocation.\n\nPlumb the packet length through xdomain_request_work and validate\nit against the expected struct size before each cast.","state":0,"publishedAt":"2026-06-25T08:38:33.547+00:00","modifiedAt":"2026-10-19T19:57:25.83+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/thunderbolt/xdomain.c\"\n ],\n \"versions\": [\n {\n \"version\": \"cdae7c07e3e3509eaabc18c1640a55dc5b99c179\",\n \"lessThan\": \"a770e62923090d7572f1f5a8507ae551d354a057\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cdae7c07e3e3509eaabc18c1640a55dc5b99c179\",\n \"lessThan\": \"0dd61ba03d05187726ecdf9c0e2175a81b9b24f6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cdae7c07e3e3509eaabc18c1640a55dc5b99c179\",\n \"lessThan\": \"79235c8add5da4bf27a12f5a5dbb579f300c059e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cdae7c07e3e3509eaabc18c1640a55dc5b99c179\",\n \"lessThan\": \"46da5c3ea011e884028a91cf913db093920a915b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cdae7c07e3e3509eaabc18c1640a55dc5b99c179\",\n \"lessThan\": \"07cd2787cdf8942d24a1a3ef81aa89b526fb6381\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cdae7c07e3e3509eaabc18c1640a55dc5b99c179\",\n \"lessThan\": \"a504b9f2797b739e0304d537e8aa4ce883ecce39\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/thunderbolt/xdomain.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.15\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.15\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.176\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.94\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.36\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.13\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":8.1,"severity":"HIGH"}],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53147","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53147","identifiers":["CVE-2026-53147"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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