CVE-2024-36909

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description In CoCo VMs, it is possible for the untrusted host to cause set memory encrypted() or set memory decrypted() to fail, resulting in shared memory. Callers need to handle these errors to avoid returning decrypted memory to the page allocator, which could lead to functional or security issues. The VMBus ring buffer code could free decrypted/shared pages if set memory decrypted() fails. Checking the decrypted field in the struct vmbus gpadl for the ring buffers can help decide whether to free the memory.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.