CVE-2026-89470

Summary

In the Linux kernel, the following vulnerability has been resolved:

power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS

Currently the cros_usbpd-charger driver probe iterates based on raw charger port count returned by the embedded controller. The only check is against the number of USB PD ports which the embedded controller also defines. A malicious embedded controller could return an inaccurate port count (up to 255) resulting in an out of bounds write and subsequent memory corruption.

Update helper functions in cros_usbpd-charger to limit port counts to EC_USB_PD_MAX_PORTS.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3af15cfacd1eef7f223802d49a88cae23c509183 < fd5f289cca04ad869b34fc9ccb647670bfdb60acaffected
LinuxLinux3af15cfacd1eef7f223802d49a88cae23c509183 < 4b1f2be1e1b74a50386ba718de3d62bfcf5ee701affected
LinuxLinux3af15cfacd1eef7f223802d49a88cae23c509183 < 304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60affected
LinuxLinux3af15cfacd1eef7f223802d49a88cae23c509183 < 657cd3a42e937276262c0a8ae6b01a87004309deaffected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References