CVE-2026-89471 Linux Kernel - Out of Bounds Write

Linux kernel power supply cros_usbpd-charger contains a buffer overflow caused by improper validation of EC-reported port counts in cros_usbpd_charger_probe(), letting a malicious or compromised EC cause out-of-bounds write, exploit requires malicious or compromised EC.

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 Write
Impact
Denial Of Service, Privilege Escalation
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 the latest Linux kernel version containing the fix for EC port count validation.

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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