CVE-2026-89470 (CVSS 8.4)

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.

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CVSS v3.1 Score

8.4

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0014

Probability of exploitation

0.04%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60 https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701 https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647 https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac

Frequently Asked Questions

What is CVE-2026-89470? +

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. It has a CVSS v3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-89470? +

CVE-2026-89470 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0014, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-89470? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-89470