Closing of an event channel in the Linux kernel can result in a deadlock.
This happens when the close is being performed in parallel to an unrelated
Xen console action and the handling of a Xen console interrupt in an
unprivileged guest.
The closing of an event channel is e.g. triggered by removal of a
paravirtual device on the other side. As this action will cause console
messages to be issued on the other side quite often, the chance of
triggering the deadlock is not neglectable.
Note that 32-bit Arm-guests are not affected, as the 32-bit Linux kernel
on Arm doesn't use queued-RW-locks, which are required to trigger the
issue (on Arm32 a waiting writer doesn't block further readers to get
the lock).
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: XEN
Published: 2024-01-05T16:30:45.807Z
Updated: 2024-08-02T16:10:06.472Z
Reserved: 2023-06-01T10:44:17.065Z
Link: CVE-2023-34324
Vulnrichment
No data.
NVD
Status : Modified
Published: 2024-01-05T17:15:08.540
Modified: 2024-01-11T21:15:10.120
Link: CVE-2023-34324
Redhat
No data.