usb: typec: ucsi: displayport: Fix OOB altmode array index

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90025
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:17:15 UTC
Updated2026-09-16 15:18:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: displayport: Fix OOB altmode array index The UCSI displayport driver indexes the connector's port altmode array with the GET_CURRENT_CAM response after checking it is not 0xff. The port altmode array is UCSI_MAX_ALTMODES elements long. If the PPM returns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and not equal to 0xff, the kernel may crash with an array index OOB error. Update the UCSI displayport driver to verify the current cam is less than UCSI_MAX_ALTMODES before accessing the port altmode array.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.7HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.7HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 8fde7e4a366184e9a6aa95541e52933a73c00a74 git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 83f1abd62cc134700ba92e1e2dc650a49a185497 git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456 git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 58e0ee293ec5e06cacbe3953ad44042f1473dae9 git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 ac9f878c468052af6571e8639ab1c3ae040b908f git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 33a81acd2d1d0667d4eff93cb90339fa53e617e8 git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 bdaaf3074aedce8f1b173cc363d61cff5f6a585f git Not specified
CNA Linux Linux affected af8622f6a585d8d82b11cd7987e082861fd0edd3 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18 git Not specified
CNA Linux Linux affected 5.2 Not specified
CNA Linux Linux unaffected 5.2 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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