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CVE-2024-36912

9.6 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Track decrypted status in vmbus_gpadl In CoCo VMs it is possible for the untrusted host to cause set_memory…

Published May 30, 2024CWE-1258EPSS 0.97%

Overview

CVE-2024-36912 is a critical-severity vulnerability. It was published on May 30, 2024 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

Drivers: hv: vmbus: Track decrypted status in vmbus_gpadl

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.

In order to make sure callers of vmbus_establish_gpadl() and

vmbus_teardown_gpadl() don't return decrypted/shared pages to

allocators, add a field in struct vmbus_gpadl to keep track of the

decryption status of the buffers. This will allow the callers to

know if they should free or leak the pages.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81Refgit.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242caRefgit.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8Refgit.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99Refgit.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81Refgit.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242caRefgit.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8Refgit.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99

How CyberStrike helps

Frequently asked questions

What is CVE-2024-36912?

CVE-2024-36912 is a critical-severity vulnerability. It was published on May 30, 2024 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2024-36912?

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-36912?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-36912?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-36912 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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