CVE-2026-90127

In the Linux kernel, the following vulnerability has been resolved: virtio: rtc: time out alarm requests RTC class operations run with rtc_device.ops_lock held. The virtio RTC alarm requests currently wait without a timeout for the device to return their requestq buffers. On surprise removal, virtio-pci marks the virtqueues broken before unregistering the virtio device. If an alarm request is waiting when the device stops responding, viortc_remove() blocks in viortc_class_stop() while trying to acquire ops_lock. The request cannot complete and device removal hangs until the waiting task is signalled. Use the same 60-second timeout as clock read requests for alarm reads, alarm programming, and alarm interrupt enable requests. The existing message reference counting keeps a timed-out request alive until a late response or device teardown.

• https://git.kernel.org/stable/c/28701b74c22d2a43ddf7aebb6378e60c18323865
• https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee
• https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977

Published

Sep 17, 2026

Last Modified

Sep 17, 2026

Status

Received

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