Security Flaw in Linux Kernel Affects Message Integrity and Encryption

CVE-2023-53769

What is CVE-2023-53769?

An issue in the Linux kernel allows for vulnerabilities related to double-buffer messages in the virt/coco/sev-guest module. The fault occurs when encryption algorithms directly read from and write to shared unencrypted memory. This mishandling may lead to information leakage and enables the host to compromise message integrity. To mitigate this threat, it is recommended to copy messages in and out fully before any computations to ensure the integrity and confidentiality of the data is preserved.

References