{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63958", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.023Z", "datePublished": "2026-07-19T14:55:48.835Z", "dateUpdated": "2026-07-20T06:41:38.075Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T06:41:38.075Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: validate connector number in ucsi_connector_change()\n\nThe connector number in a UCSI CCI notification is a 7-bit field\nsupplied by the PPM. ucsi_connector_change() uses it to index the\nucsi->connector[] array without checking it against the number of\nconnectors the PPM reported at init time, so a buggy or malicious PPM\n(EC firmware, or an I2C-attached UCSI controller on the ccg / stm32g0 /\nglink transports) can drive schedule_work() on memory past the end of\nthe array.\n\nReject connector numbers that are zero or exceed cap.num_connectors\nbefore dereferencing the array."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/typec/ucsi/ucsi.c"], "versions": [{"version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f", "lessThan": "cea949203faef9cb783adc7b978cce056271e057", "status": "affected", "versionType": "git"}, {"version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f", "lessThan": "156b6f0aec6108909b0c4aedc78865b12766b347", "status": "affected", "versionType": "git"}, {"version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f", "lessThan": "bd24d92af4ae021b6209f28e9a57e1bf2260d4fd", "status": "affected", "versionType": "git"}, {"version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f", "lessThan": "0edd1e21587b0483c7ceb993b9fb9668bbef7433", "status": "affected", "versionType": "git"}, {"version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f", "lessThan": "5af2719b460ab904c504fc069d1dd2a3aa2b22b0", "status": "affected", "versionType": "git"}, {"version": "c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f", "lessThan": "288a81a8507052bcfbf884d39a463c44c42c5fd9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/typec/ucsi/ucsi.c"], "versions": [{"version": "4.13", "status": "affected"}, {"version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057"}, {"url": "https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347"}, {"url": "https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd"}, {"url": "https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433"}, {"url": "https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0"}, {"url": "https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9"}], "title": "usb: typec: ucsi: validate connector number in ucsi_connector_change()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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