Description

In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.

References 4

• git.kernel.org https://git.kernel.org/stable/c/4b69c63f716cfda38e1210e65b68f67f6cee2ddf
• git.kernel.org https://git.kernel.org/stable/c/577a64725bfd77645986168e953d405067ee565b
• git.kernel.org https://git.kernel.org/stable/c/965006103a14703cc42043bbf9b5e0cdf7a468ad
• git.kernel.org https://git.kernel.org/stable/c/c27dafc4aa50a29ec927b3aa84ac7b430071f682

Remediation