CVE-2026-89470 Linux kernel cros_usbpd - Out of Bounds Read/Write

Linux kernel power supply cros_usbpd driver contains an out-of-bounds write vulnerability caused by improper validation of port counts from the embedded controller, letting a malicious embedded controller cause memory corruption, exploit requires a malicious embedded controller.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read/Write
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to a Linux kernel version that limits port counts to EC_USB_PD_MAX_PORTS or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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