Out-of-bounds write in Linux kernel - CVE-2026-89471
Published: September 12, 2026
Vulnerability identifier: #VU149336
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89471
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-89471
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3