Out-of-bounds read in Linux kernel - CVE-2026-90025
Published: September 16, 2026
Vulnerability identifier: #VU150262
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90025
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in the UCSI DisplayPort driver's port altmode array when processing an invalid GET_CURRENT_CAM response from the PPM. A remote attacker can cause the PPM to return an altmode array index above UCSI_MAX_ALTMODES to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-90025
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18
- https://git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456
- https://git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8
- https://git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9
- https://git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497
- https://git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74
- https://git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f
- https://git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f