Use of Uninitialized Variable in Linux kernel - CVE-2026-64230
Published: July 27, 2026
Vulnerability identifier: #VU139763
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-64230
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to use of uninitialized memory in tps65219_regulator_irq_handler when handling regulator IRQ events. A local attacker can trigger an IRQ that reaches regulator_notifier_call_chain() with an uninitialized rdev pointer to cause a denial of service.
The issue affects the TPS65219 regulator driver in the Linux kernel.
How to mitigate CVE-2026-64230
Install security update from vendor's repository.