{"api_version":"1","generated_at":"2026-09-17T14:47:49+00:00","cve":"CVE-2026-90025","urls":{"html":"https://cve.report/CVE-2026-90025","api":"https://cve.report/api/cve/CVE-2026-90025.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90025","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90025"},"summary":{"title":"usb: typec: ucsi: displayport: Fix OOB altmode array index","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: displayport: Fix OOB altmode array index\n\nThe UCSI displayport driver indexes the connector's port altmode array\nwith the GET_CURRENT_CAM response after checking it is not 0xff. The\nport altmode array is UCSI_MAX_ALTMODES elements long. If the PPM\nreturns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and\nnot equal to 0xff, the kernel may crash with an array index OOB error.\n\nUpdate the UCSI displayport driver to verify the current cam is less\nthan UCSI_MAX_ALTMODES before accessing the port altmode array.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-16 11:17:15","updated_at":"2026-09-16 15:18:25"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","data":{"baseScore":7.7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f","name":"https://git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497","name":"https://git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74","name":"https://git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9","name":"https://git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18","name":"https://git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f","name":"https://git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8","name":"https://git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456","name":"https://git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90025","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90025","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af8622f6a585d8d82b11cd7987e082861fd0edd3 8fde7e4a366184e9a6aa95541e52933a73c00a74 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af8622f6a585d8d82b11cd7987e082861fd0edd3 83f1abd62cc134700ba92e1e2dc650a49a185497 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af8622f6a585d8d82b11cd7987e082861fd0edd3 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af8622f6a585d8d82b11cd7987e082861fd0edd3 58e0ee293ec5e06cacbe3953ad44042f1473dae9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.51 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.5 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/typec/ucsi/displayport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8fde7e4a366184e9a6aa95541e52933a73c00a74","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"83f1abd62cc134700ba92e1e2dc650a49a185497","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"58e0ee293ec5e06cacbe3953ad44042f1473dae9","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"ac9f878c468052af6571e8639ab1c3ae040b908f","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"33a81acd2d1d0667d4eff93cb90339fa53e617e8","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"bdaaf3074aedce8f1b173cc363d61cff5f6a585f","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"},{"lessThan":"04cec690b1fd9d1c4c314b91a10d8c68a3acfe18","status":"affected","version":"af8622f6a585d8d82b11cd7987e082861fd0edd3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/typec/ucsi/displayport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.2"},{"lessThan":"5.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.51","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.51","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.5","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc2","versionStartIncluding":"5.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: displayport: Fix OOB altmode array index\n\nThe UCSI displayport driver indexes the connector's port altmode array\nwith the GET_CURRENT_CAM response after checking it is not 0xff. The\nport altmode array is UCSI_MAX_ALTMODES elements long. If the PPM\nreturns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and\nnot equal to 0xff, the kernel may crash with an array index OOB error.\n\nUpdate the UCSI displayport driver to verify the current cam is less\nthan UCSI_MAX_ALTMODES before accessing the port altmode array."}],"metrics":[{"cvssV3_1":{"baseScore":7.7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The OOB index is the PPM GET_CURRENT_CAM byte from onboard UCSI firmware (ACPI EC, I2C CCG/STM32G0, pmic_glink, Chrome OS EC), not a USB-C partner or network packet. A compromised PPM can report CONNECTED plus DP partner altmodes and drive enter without a physical plug, matching other firmware-to-kernel scores.\nAC:L - The PPM fully controls the GET_CURRENT_CAM u8; any value in 30-254 (UCSI_MAX_ALTMODES is 30, 0xff is the only sentinel) deterministically indexes port_altmode[] out of bounds with no race or attacker-uncontrollable layout.\nPR:N - UCSI connector-change work, GET_CURRENT_CAM, and dp_altmode_probe's automatic enter run in kernel context from PPM notifications with no capable() or credential check, so compromised PPM/EC firmware needs no host account.\nUI:N - Partner registration and DisplayPort altmode enter run automatically from PPM connector-change events and dp_altmode_probe scheduled work; no victim must plug a cable, mount media, or open a device node.\nS:U - The out-of-bounds pointer load stays inside the host kernel UCSI DisplayPort driver and connector heap; it does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - cur is a full u8 used as an index into port_altmode[UCSI_MAX_ALTMODES], so values 30-254 read a kernel pointer from up to about 2KB past the array into adjacent connector/heap memory; that unbounded OOB read scores Confidentiality High.\nI:N - The OOB pointer is only compared to alt to choose 0 versus -EBUSY; it is never written, stored, or used as a write address, so there is no OOB write, use-after-free, or control-flow hijack primitive.\nA:H - An out-of-range CAM can load from unmapped heap, trip KASAN/UBSAN array-index-out-of-bounds, or oops as the fix describes, producing a kernel panic that the PPM can retrigger on each enter."}]}],"providerMetadata":{"dateUpdated":"2026-09-16T14:41:40.331Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74"},{"url":"https://git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497"},{"url":"https://git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456"},{"url":"https://git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9"},{"url":"https://git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f"},{"url":"https://git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8"},{"url":"https://git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f"},{"url":"https://git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18"}],"title":"usb: typec: ucsi: displayport: Fix OOB altmode array index","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90025","datePublished":"2026-09-16T10:33:28.313Z","dateReserved":"2026-09-11T19:38:34.782Z","dateUpdated":"2026-09-16T14:41:40.331Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 11:17:15","lastModifiedDate":"2026-09-16 15:18:25","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90025","Ordinal":"1","Title":"usb: typec: ucsi: displayport: Fix OOB altmode array index","CVE":"CVE-2026-90025","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90025","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: displayport: Fix OOB altmode array index\n\nThe UCSI displayport driver indexes the connector's port altmode array\nwith the GET_CURRENT_CAM response after checking it is not 0xff. The\nport altmode array is UCSI_MAX_ALTMODES elements long. If the PPM\nreturns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and\nnot equal to 0xff, the kernel may crash with an array index OOB error.\n\nUpdate the UCSI displayport driver to verify the current cam is less\nthan UCSI_MAX_ALTMODES before accessing the port altmode array.","Type":"Description","Title":"usb: typec: ucsi: displayport: Fix OOB altmode array index"}]}}}