CVE-2023-53769: virt/coco/sev-guest: Double-buffer messages
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
In virt/coco/sev-guest, double-buffer messages by copying whole messages into or out of shared unencrypted memory before performing encryption computations, rather than reading from or writing directly to shared memory.
Event History
Frequently Asked Questions
What is the severity of CVE-2023-53769?
CVE-2023-53769 has a risk rating of 38, indicating a significant security concern.
What are the potential impacts of CVE-2023-53769?
CVE-2023-53769 may allow information leakage and integrity tampering of messages in the Linux kernel.
How do I fix CVE-2023-53769?
To fix CVE-2023-53769, update the Linux kernel to the latest patched version provided by The Linux Foundation.
Is CVE-2023-53769 specific to certain versions of the Linux kernel?
Yes, CVE-2023-53769 affects specific versions of the Linux kernel that utilize the virt/coco/sev-guest feature.
What does the term 'double-buffer messages' mean in the context of CVE-2023-53769?
In CVE-2023-53769, 'double-buffer messages' refers to the flawed handling of encryption algorithms that directly interact with unencrypted shared memory.