{"api_version":"1","generated_at":"2026-05-13T07:40:46+00:00","cve":"CVE-2026-31729","urls":{"html":"https://cve.report/CVE-2026-31729","api":"https://cve.report/api/cve/CVE-2026-31729.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31729","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31729"},"summary":{"title":"usb: typec: ucsi: validate connector number in ucsi_notify_common()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: validate connector number in ucsi_notify_common()\n\nThe connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a\n7-bit field (0-127) that is used to index into the connector array in\nucsi_connector_change(). However, the array is only allocated for the\nnumber of connectors reported by the device (typically 2-4 entries).\n\nA malicious or malfunctioning device could report an out-of-range\nconnector number in the CCI, causing an out-of-bounds array access in\nucsi_connector_change().\n\nAdd a bounds check in ucsi_notify_common(), the central point where CCI\nis parsed after arriving from hardware, so that bogus connector numbers\nare rejected before they propagate further.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 15:16:35","updated_at":"2026-05-07 16:02:57"},"problem_types":["CWE-129"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/f6dcbf2b024d55549959402f1db6c614e51d52cb","name":"https://git.kernel.org/stable/c/f6dcbf2b024d55549959402f1db6c614e51d52cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d2d8c17ac01a1b1f638ea5d340a884ccc5015186","name":"https://git.kernel.org/stable/c/d2d8c17ac01a1b1f638ea5d340a884ccc5015186","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f4e608fe12b7ac6a4a57176ab0296bb5a110a078","name":"https://git.kernel.org/stable/c/f4e608fe12b7ac6a4a57176ab0296bb5a110a078","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/98429e9ec89a5e3a204112dfaa2dbe6ca28493a0","name":"https://git.kernel.org/stable/c/98429e9ec89a5e3a204112dfaa2dbe6ca28493a0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31729","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31729","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bdc62f2bae8fb0e8e99574de5232f0a3c54a27df f6dcbf2b024d55549959402f1db6c614e51d52cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bdc62f2bae8fb0e8e99574de5232f0a3c54a27df f4e608fe12b7ac6a4a57176ab0296bb5a110a078 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bdc62f2bae8fb0e8e99574de5232f0a3c54a27df 98429e9ec89a5e3a204112dfaa2dbe6ca28493a0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bdc62f2bae8fb0e8e99574de5232f0a3c54a27df d2d8c17ac01a1b1f638ea5d340a884ccc5015186 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: validate connector number in ucsi_notify_common()\n\nThe connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a\n7-bit field (0-127) that is used to index into the connector array in\nucsi_connector_change(). However, the array is only allocated for the\nnumber of connectors reported by the device (typically 2-4 entries).\n\nA malicious or malfunctioning device could report an out-of-range\nconnector number in the CCI, causing an out-of-bounds array access in\nucsi_connector_change().\n\nAdd a bounds check in ucsi_notify_common(), the central point where CCI\nis parsed after arriving from hardware, so that bogus connector numbers\nare rejected before they propagate further."}],"providerMetadata":{"dateUpdated":"2026-05-01T14:14:28.868Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f6dcbf2b024d55549959402f1db6c614e51d52cb"},{"url":"https://git.kernel.org/stable/c/f4e608fe12b7ac6a4a57176ab0296bb5a110a078"},{"url":"https://git.kernel.org/stable/c/98429e9ec89a5e3a204112dfaa2dbe6ca28493a0"},{"url":"https://git.kernel.org/stable/c/d2d8c17ac01a1b1f638ea5d340a884ccc5015186"}],"title":"usb: typec: ucsi: validate connector number in ucsi_notify_common()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31729","datePublished":"2026-05-01T14:14:28.868Z","dateReserved":"2026-03-09T15:48:24.134Z","dateUpdated":"2026-05-01T14:14:28.868Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 15:16:35","lastModifiedDate":"2026-05-07 16:02:57","problem_types":["CWE-129"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.81","matchCriteriaId":"D1C17227-02C7-4A55-A9E6-1F88A48429E5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.22","matchCriteriaId":"C9DF8BCE-36D3-475D-9D21-19E4F02F9029"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.12","matchCriteriaId":"0A2B9540-02D5-41B4-B16A-82AF66FD4F36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","matchCriteriaId":"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","matchCriteriaId":"F666C8D8-6538-46D4-B318-87610DE64C34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","matchCriteriaId":"02259FDA-961B-47BC-AE7F-93D7EC6E90C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","matchCriteriaId":"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","matchCriteriaId":"1D2315C0-D46F-4F85-9754-F9E5E11374A6"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31729","Ordinal":"1","Title":"usb: typec: ucsi: validate connector number in ucsi_notify_commo","CVE":"CVE-2026-31729","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31729","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: validate connector number in ucsi_notify_common()\n\nThe connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a\n7-bit field (0-127) that is used to index into the connector array in\nucsi_connector_change(). However, the array is only allocated for the\nnumber of connectors reported by the device (typically 2-4 entries).\n\nA malicious or malfunctioning device could report an out-of-range\nconnector number in the CCI, causing an out-of-bounds array access in\nucsi_connector_change().\n\nAdd a bounds check in ucsi_notify_common(), the central point where CCI\nis parsed after arriving from hardware, so that bogus connector numbers\nare rejected before they propagate further.","Type":"Description","Title":"usb: typec: ucsi: validate connector number in ucsi_notify_commo"}]}}}