CVE-2026-64261
Description
A flaw was found in the Linux kernel's fuse-uring component. This use-after-free vulnerability allows a local attacker to potentially achieve privilege escalation. The issue arises when the fuse_uring_async_stop_queues() function attempts to access memory that has already been freed, leading to unpredictable system behavior or unauthorized access. This flaw is mitigated by ensuring that a proper reference to the fuse_conn structure is maintained until the associated work queue has fully terminated.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
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