{"api_version":"1","generated_at":"2026-10-24T06:42:12+00:00","cve":"CVE-2026-98687","urls":{"html":"https://cve.report/CVE-2026-98687","api":"https://cve.report/api/cve/CVE-2026-98687.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98687","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98687"},"summary":{"title":"thunderbolt: Reject oversized XDomain properties responses","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:22","updated_at":"2026-10-21 13:21:37"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b270c1074860de74da0d6b5250fb06b359b9d509","name":"https://git.kernel.org/stable/c/b270c1074860de74da0d6b5250fb06b359b9d509","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a766a86ff48acee76aeb8e2575771040749e509d","name":"https://git.kernel.org/stable/c/a766a86ff48acee76aeb8e2575771040749e509d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa","name":"https://git.kernel.org/stable/c/2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/737a1d2e9642d5f718bd29aa4a98b9eef3832f0a","name":"https://git.kernel.org/stable/c/737a1d2e9642d5f718bd29aa4a98b9eef3832f0a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/80756e263846ab694984e749e8c626897331438f","name":"https://git.kernel.org/stable/c/80756e263846ab694984e749e8c626897331438f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98687","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98687","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d1ff70241a275133e1a0258b7c23588b122276c8 b270c1074860de74da0d6b5250fb06b359b9d509 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d1ff70241a275133e1a0258b7c23588b122276c8 a766a86ff48acee76aeb8e2575771040749e509d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d1ff70241a275133e1a0258b7c23588b122276c8 2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d1ff70241a275133e1a0258b7c23588b122276c8 737a1d2e9642d5f718bd29aa4a98b9eef3832f0a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d1ff70241a275133e1a0258b7c23588b122276c8 80756e263846ab694984e749e8c626897331438f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98687","cve":"CVE-2026-98687","epss":"0.001680000","percentile":"0.057130000","score_date":"2026-10-21","updated_at":"2026-10-22 00:15:10"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/thunderbolt/xdomain.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b270c1074860de74da0d6b5250fb06b359b9d509","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"a766a86ff48acee76aeb8e2575771040749e509d","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"737a1d2e9642d5f718bd29aa4a98b9eef3832f0a","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"80756e263846ab694984e749e8c626897331438f","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/thunderbolt/xdomain.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.15"},{"lessThan":"4.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-21T12:55:42.401Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b270c1074860de74da0d6b5250fb06b359b9d509"},{"url":"https://git.kernel.org/stable/c/a766a86ff48acee76aeb8e2575771040749e509d"},{"url":"https://git.kernel.org/stable/c/2f97f929dad9eb3e1f63b721d2dd49bf9bc68efa"},{"url":"https://git.kernel.org/stable/c/737a1d2e9642d5f718bd29aa4a98b9eef3832f0a"},{"url":"https://git.kernel.org/stable/c/80756e263846ab694984e749e8c626897331438f"}],"title":"thunderbolt: Reject oversized XDomain properties responses","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98687","datePublished":"2026-10-18T15:45:58.719Z","dateReserved":"2026-09-25T10:25:14.364Z","dateUpdated":"2026-10-21T12:55:42.401Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:22","lastModifiedDate":"2026-10-21 13:21:37","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98687","Ordinal":"1","Title":"thunderbolt: Reject oversized XDomain properties responses","CVE":"CVE-2026-98687","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98687","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"thunderbolt: Reject oversized XDomain properties responses"}]}}}