In the Linux kernel, the following vulnerability has been resolved: virtio: rtc: time out alarm...
🔗 CVE IDs covered (1)
📋 Description
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.
🔗 References (5)
- https://nvd.nist.gov/vuln/detail/CVE-2026-90127
- https://git.kernel.org/stable/c/28701b74c22d2a43ddf7aebb6378e60c18323865
- https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee
- https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977
- https://github.com/advisories/GHSA-h4vf-f6xj-7ccf