power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS (CVE-2026-89470) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89470

power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS

Answer in brief

CVE-2026-89470 records a Unknown severity vulnerability in power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=3af15cfacd1eef7f223802d49a88cae23c509183 <fd5f289cca04ad869b34fc9ccb647670bfdb60ac \|\| >=3af15cfacd1eef7f223802d49a88cae23c509183 <4b1f2be1e1b74a50386ba718de3d62bfcf5ee701 \|\| >=3af15cfacd1eef7f223802d49a88cae23c509183 <304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60 \|\| >=3af15cfacd1eef7f223802d49a88cae23c509183 <657cd3a42e937276262c0a8ae6b01a87004309de	fd5f289cca04ad869b34fc9ccb647670bfdb60ac, 4b1f2be1e1b74a50386ba718de3d62bfcf5ee701, 304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60, 657cd3a42e937276262c0a8ae6b01a87004309de
Linux/Linuxgeneric	4.20	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to fd5f289cca04ad869b34fc9ccb647670bfdb60ac if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.