A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 6.2 (excluding) |
| Linux_kernel | Linux | 6.2 (including) | 6.2 (including) |
| Linux_kernel | Linux | 6.2-rc1 (including) | 6.2-rc1 (including) |
| Linux_kernel | Linux | 6.2-rc2 (including) | 6.2-rc2 (including) |
| Linux_kernel | Linux | 6.2-rc3 (including) | 6.2-rc3 (including) |
| Linux_kernel | Linux | 6.2-rc4 (including) | 6.2-rc4 (including) |
Locking is a type of synchronization behavior that ensures that multiple independently-operating processes or threads do not interfere with each other when accessing the same resource. All processes/threads are expected to follow the same steps for locking. If these steps are not followed precisely - or if no locking is done at all - then another process/thread could modify the shared resource in a way that is not visible or predictable to the original process. This can lead to data or memory corruption, denial of service, etc.