A race condition flaw was found in the Linux kernel sound subsystem due to improper locking. It could lead to a NULL pointer dereference while handling the SNDCTL_DSP_SYNC ioctl. A privileged local user (root or member of the audio group) could use this flaw to crash the system, resulting in a denial of service condition
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 | * | 6.0 (excluding) |
Linux_kernel | Linux | 6.0-rc1 (including) | 6.0-rc1 (including) |
Linux_kernel | Linux | 6.0-rc2 (including) | 6.0-rc2 (including) |
Linux_kernel | Linux | 6.0-rc3 (including) | 6.0-rc3 (including) |
Linux_kernel | Linux | 6.0-rc4 (including) | 6.0-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.