CVE-2026-74749

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A hard lockup can occur during a granted time slice extension. The function exit to user mode loop() calls rseq grant timeslice extension() while interrupts are enabled. If the extension is granted, it triggers hrtimer rearm deferred tif(), which subsequently calls hrtimer rearm deferred(). Because hrtimer rearm deferred() uses raw spin lock() to acquire hrtimer cpu base::lock, it requires interrupts to be disabled to avoid a livelock.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.