Linux Kernel up to 7.3-rc1 UCSI displayport driver out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 7.3-rc1. This vulnerability affects unknown code of the component UCSI displayport driver. The manipulation results in out-of-bounds. This vulnerability is known as CVE-2026-90025. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.3-rc1. It has been classified as critical. Affected is an unknown part of the component UCSI displayport driver. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In 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.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-90025 since 09/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/16/2026).

Upgrading to version 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc2 eliminates this vulnerability. Applying the patch 8fde7e4a366184e9a6aa95541e52933a73c00a74/83f1abd62cc134700ba92e1e2dc650a49a185497/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456/58e0ee293ec5e06cacbe3953ad44042f1473dae9/ac9f878c468052af6571e8639ab1c3ae040b908f/33a81acd2d1d0667d4eff93cb90339fa53e617e8/bdaaf3074aedce8f1b173cc363d61cff5f6a585f/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc2
Patch: 8fde7e4a366184e9a6aa95541e52933a73c00a74/83f1abd62cc134700ba92e1e2dc650a49a185497/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456/58e0ee293ec5e06cacbe3953ad44042f1473dae9/ac9f878c468052af6571e8639ab1c3ae040b908f/33a81acd2d1d0667d4eff93cb90339fa53e617e8/bdaaf3074aedce8f1b173cc363d61cff5f6a585f/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90025 (🔒)
GCVE (CVE): GCVE-0-2026-90025
GCVE (VulDB): GCVE-100-405870

Entryinfo

Created: 09/16/2026 15:28
Changes: 09/16/2026 15:28 (58)
Complete: 🔍
Cache ID: 216::103

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