CVE-2026-64262
Description
A flaw was found in the fuse-uring component of the Linux kernel. When io_uring task work is canceled, the system fails to properly end a fuse_req (FUSE request). This can cause the originating system call thread to block indefinitely, leading to a Denial of Service (DoS) for the affected system. Additionally, repeated cancellations can exhaust background request limits, further stalling operations.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (Other); DoS: Resource Consumption (Memory); DoS: Resource Consumption (CPU)
An attacker that can influence the allocation of resources that are not properly released could deplete the available resource pool and prevent all other processes from accessing the same type of resource. Frequently-affected resources include memory, CPU, disk space, power or battery, etc.
Frequently Asked Questions
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