power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 6 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89470
- 2026-10-03 Alias added: GHSA-xchr-hvc5-jhvq
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647
- https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b
- https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d
- https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e
- https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac
- https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701
- https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60
- https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de
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Sources
- CVE-2026-89470 · CVE Program
- CVE-2026-89470 · NVD
- FIRST EPSS
- GHSA-xchr-hvc5-jhvq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89470 · Red Hat security data · CC BY 4.0
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