{"api_version":"1","generated_at":"2026-07-24T01:42:24+00:00","cve":"CVE-2026-63958","urls":{"html":"https://cve.report/CVE-2026-63958","api":"https://cve.report/api/cve/CVE-2026-63958.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63958","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63958"},"summary":{"title":"usb: typec: ucsi: validate connector number in ucsi_connector_change()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:14","updated_at":"2026-07-20 07:16:40"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0","name":"https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057","name":"https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347","name":"https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd","name":"https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9","name":"https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433","name":"https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63958","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63958","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f cea949203faef9cb783adc7b978cce056271e057 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f 156b6f0aec6108909b0c4aedc78865b12766b347 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f bd24d92af4ae021b6209f28e9a57e1bf2260d4fd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f 0edd1e21587b0483c7ceb993b9fb9668bbef7433 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f 5af2719b460ab904c504fc069d1dd2a3aa2b22b0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f 288a81a8507052bcfbf884d39a463c44c42c5fd9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63958","cve":"CVE-2026-63958","epss":"0.002050000","percentile":"0.107240000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/typec/ucsi/ucsi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cea949203faef9cb783adc7b978cce056271e057","status":"affected","version":"c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f","versionType":"git"},{"lessThan":"156b6f0aec6108909b0c4aedc78865b12766b347","status":"affected","version":"c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f","versionType":"git"},{"lessThan":"bd24d92af4ae021b6209f28e9a57e1bf2260d4fd","status":"affected","version":"c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f","versionType":"git"},{"lessThan":"0edd1e21587b0483c7ceb993b9fb9668bbef7433","status":"affected","version":"c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f","versionType":"git"},{"lessThan":"5af2719b460ab904c504fc069d1dd2a3aa2b22b0","status":"affected","version":"c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f","versionType":"git"},{"lessThan":"288a81a8507052bcfbf884d39a463c44c42c5fd9","status":"affected","version":"c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/typec/ucsi/ucsi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.13"},{"lessThan":"4.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"4.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"4.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-07-20T06:41:38.075Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63958","datePublished":"2026-07-19T14:55:48.835Z","dateReserved":"2026-07-19T07:54:57.023Z","dateUpdated":"2026-07-20T06:41:38.075Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:14","lastModifiedDate":"2026-07-20 07:16:40","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63958","Ordinal":"1","Title":"usb: typec: ucsi: validate connector number in ucsi_connector_ch","CVE":"CVE-2026-63958","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63958","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"usb: typec: ucsi: validate connector number in ucsi_connector_ch"}]}}}