{"id":"CVE-2026-64330","state":"PUBLISHED","title":"usb: typec: tcpm: Validate SVID index in svdm_consume_modes()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpm: Validate SVID index in svdm_consume_modes()\n\nIn svdm_consume_modes(), the SVID value is read from pmdata->svids using\npmdata->svid_index as an array index without bounds validation:\n\n    paltmode->svid = pmdata->svids[pmdata->svid_index];\n\nIf pmdata->svid_index is driven beyond SVID_DISCOVERY_MAX (16), it results\nin an out-of-bounds read of the pmdata->svids array. Because pd_mode_data\nis embedded inside struct tcpm_port, indexing past svids reads into\nadjacent fields. In particular:\n- At index 16, it reads the altmodes count.\n- At index 18 and beyond, it reads into altmode_desc[], which contains\n  partner-supplied SVDM Discovery Modes VDOs.\n\nBy injecting a chosen SVID into altmode_desc[0].vdo and driving svid_index\nto 20, the partner can force paltmode->svid to be loaded with an arbitrary,\npartner- chosen SVID, which is then registered via\ntypec_partner_register_altmode().\n\nFix this by validating that pmdata->svid_index is non-negative and strictly\nless than pmdata->nsvids before accessing the pmdata->svids array inside\nsvdm_consume_modes().","publishedAt":"2026-07-25T08:49:57.734Z","updatedAt":"2026-08-17T04:53:32.777Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"d638ec188e95fe60f4b01106ffd41958f8fb3c2c","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"f8163c414de8640f2ca82ce4dc93409d4cdc2fad","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"012406f89abc52d1d5f07aa5653b519ebf6d2407","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"c6d2af3b217a525741c472f0ab45d7d274b8468f","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"3e1b1ac47e8163627f159f30d80d51b914620dd4","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"313ca06e7e224ca1dfadd5722fe71fb8bc276b8b","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"7b681dd5fbf60b24a13c14661e5b7735759fb491","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/tcpm/tcpm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/tcpm/tcpm.c"]}],"references":["https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53","https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c","https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad","https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407","https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f","https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4","https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b","https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64330.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64330","state":"PUBLISHED","datePublished":"2026-07-25T08:49:57.734Z","dateUpdated":"2026-08-17T04:53:32.777Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.781Z"},"containers":{"cna":{"title":"usb: typec: tcpm: Validate SVID index in svdm_consume_modes()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpm: Validate SVID index in svdm_consume_modes()\n\nIn svdm_consume_modes(), the SVID value is read from pmdata->svids using\npmdata->svid_index as an array index without bounds validation:\n\n    paltmode->svid = pmdata->svids[pmdata->svid_index];\n\nIf pmdata->svid_index is driven beyond SVID_DISCOVERY_MAX (16), it results\nin an out-of-bounds read of the pmdata->svids array. Because pd_mode_data\nis embedded inside struct tcpm_port, indexing past svids reads into\nadjacent fields. In particular:\n- At index 16, it reads the altmodes count.\n- At index 18 and beyond, it reads into altmode_desc[], which contains\n  partner-supplied SVDM Discovery Modes VDOs.\n\nBy injecting a chosen SVID into altmode_desc[0].vdo and driving svid_index\nto 20, the partner can force paltmode->svid to be loaded with an arbitrary,\npartner- chosen SVID, which is then registered via\ntypec_partner_register_altmode().\n\nFix this by validating that pmdata->svid_index is non-negative and strictly\nless than pmdata->nsvids before accessing the pmdata->svids array inside\nsvdm_consume_modes()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"d638ec188e95fe60f4b01106ffd41958f8fb3c2c","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"f8163c414de8640f2ca82ce4dc93409d4cdc2fad","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"012406f89abc52d1d5f07aa5653b519ebf6d2407","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"c6d2af3b217a525741c472f0ab45d7d274b8468f","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"3e1b1ac47e8163627f159f30d80d51b914620dd4","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"313ca06e7e224ca1dfadd5722fe71fb8bc276b8b","versionType":"git"},{"version":"4ab8c18d4d67321cc7b660559de17511d4fc0237","status":"affected","lessThan":"7b681dd5fbf60b24a13c14661e5b7735759fb491","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/tcpm/tcpm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/tcpm/tcpm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53"},{"url":"https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c"},{"url":"https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad"},{"url":"https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407"},{"url":"https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f"},{"url":"https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4"},{"url":"https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b"},{"url":"https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:53:32.777Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}