CVEvulnerability
CVE-2026-89470
8.4 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-09-11
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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.
References
- https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60 git.kernel.org
- https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e git.kernel.org
- https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b git.kernel.org
- https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701 git.kernel.org
- https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de git.kernel.org
- https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d git.kernel.org
- https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647 git.kernel.org
- https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac git.kernel.org