Description
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted In CoCo VMs it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) 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. Check the decrypted field in the struct vmbus_gpadl for the ring buffers to decide whether to free the memory.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d4dccf353db80e209f262e3973c834e6e48ba9a9 to < 2f622008bf784a9f5dd17baa19223cc2ac30a039affectedd4dccf353db80e209f262e3973c834e6e48ba9a9 to < 82f9e213b124a7d2bb5b16ea35d570260ef467e0affectedd4dccf353db80e209f262e3973c834e6e48ba9a9 to < a9212a4e2963a7fbe3864ba33dc551d4ad8d0abbaffectedd4dccf353db80e209f262e3973c834e6e48ba9a9 to < 30d18df6567be09c1433e81993e35e3da573ac48affected
Linux Linux
Default version status: affected
5.16affected0 to < 5.16unaffected6.1.91 to ≤ 6.1.*unaffected6.6.31 to ≤ 6.6.*unaffected6.8.10 to ≤ 6.8.*unaffected6.9 to ≤ *unaffected