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CVE-2024-46794

3.3 · LOW

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM.

Published Sep 18, 2024EPSS 0.20%

Overview

CVE-2024-46794 is a low-severity vulnerability. It was published on September 18, 2024 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

x86/tdx: Fix data leak in mmio_read()

The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an

address from the VMM.

Sean noticed that mmio_read() unintentionally exposes the value of an

initialized variable (val) on the stack to the VMM.

This variable is only needed as an output value. It did not need to be

passed to the VMM in the first place.

Do not send the original value of *val to the VMM.

[ dhansen: clarify what 'val' is used for. ]

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/26c6af49d26ffc377e392e30d4086db19eed0ef7Refgit.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461faRefgit.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661Refgit.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-46794?

CVE-2024-46794 is a low-severity vulnerability. It was published on September 18, 2024 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2024-46794?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-46794?

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-2024-46794?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-46794 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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