Linux Kernel CVE-2026-23063
MEDIUMCVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
uacce: ensure safe queue release with state management
Directly calling put_queue carries risks since it cannot guarantee that resources of uacce_queue have been fully released beforehand. So adding a stop_queue operation for the UACCE_CMD_PUT_Q command and leaving the put_queue operation to the final resource release ensures safety.
Queue states are defined as follows:
- UACCE_Q_ZOMBIE: Initial state
- UACCE_Q_INIT: After opening
uacce - UACCE_Q_STARTED: After
startis issued viaioctl
When executing poweroff -f in virt while accelerator are still working, uacce_fops_release and uacce_remove may execute concurrently. This can cause uacce_put_queue within uacce_fops_release to access a NULL ops pointer. Therefore, add state checks to prevent accessing freed pointers.
AnalysisAI
Linux kernel UACCE subsystem is vulnerable to a null pointer dereference that causes a denial of service when queue release and device removal operations execute concurrently during system shutdown. A local attacker with standard user privileges can trigger this condition by forcing accelerator queue cleanup while the device is being removed, crashing the kernel. …
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RemediationAI
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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