CVE-2026-64230: regulator: tps65219: fix irq_data.rdev not being assigned
In the Linux kernel, the following vulnerability has been resolved:
regulator: tps65219: fix irqdata.rdev not being assigned
Commit 64a6b577490c ("regulator: tps65219: Remove debugging helper function") removed the tps65219getrdevbyname() helper along with the irqdata.rdev assignment that depended on it. This left irqdata.rdev uninitialized for all IRQs, causing undefined behavior when regulatornotifiercallchain() is called from the IRQ handler:
Internal error: Oops: 0000000096000004 pc : regulatornotifiercallchain lr : tps65219regulatorirqhandler Call trace: regulatornotifiercallchain tps65219regulatorirqhandler handlenestedirq regmapirqthread irqthreadfn irqthread kthread retfromfork
Instead of restoring a dedicated lookup array, restructure the probe function to combine regulator registration with IRQ registration in the same loop. This way the rdev returned by devmregulatorregister() is naturally available for assigning to irqdata.rdev without any auxiliary data structure.
Non-regulator IRQs (SENSOR, TIMEOUT) that don't correspond to any registered regulator are registered with rdev=NULL, and the IRQ handler is protected with a NULL check to avoid crashing.
Affected Software
Remediation
Event History
Frequently Asked Questions
What systems are affected by CVE-2026-64230?
CVE-2026-64230 affects the Linux kernel, particularly implementations using the tps65219 regulator.
What is the severity of CVE-2026-64230?
The severity of CVE-2026-64230 has been rated as 34.
How does CVE-2026-64230 impact system security?
CVE-2026-64230 can result in improper assignment of irq_data.rdev, potentially leading to unexpected behavior or vulnerabilities.
How can I mitigate CVE-2026-64230?
To mitigate CVE-2026-64230, ensure you update your Linux kernel to the latest version where this vulnerability has been resolved.
What is the main fix for CVE-2026-64230?
The main fix for CVE-2026-64230 is the restoration of the irq_data.rdev assignment in the tps65219 regulator driver.