SB20260912314 - Out-of-bounds write in Linux kernel power supply driver
Published: September 12, 2026
Security Bulletin ID
SB20260912314
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-89471)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to corrupt kernel memory.
The vulnerability exists due to an out-of-bounds write in cros_usbpd_charger_probe() in the cros_usbpd-charger driver when processing EC-reported USB PD and charger port counts. A local privileged user can cause a compromised EC to report port counts exceeding the fixed ports[] array capacity to corrupt kernel memory.
The ports[] array contains eight entries.
Remediation
Install update from vendor's website.