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CVE-2024-47748

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: assign irq bypass producer token correctly We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_…

Published Oct 21, 2024CWE-416EPSS 0.21%

Overview

CVE-2024-47748 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

vhost_vdpa: assign irq bypass producer token correctly

We used to call irq_bypass_unregister_producer() in

vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the

token pointer is still valid or not.

Actually, we use the eventfd_ctx as the token so the life cycle of the

token should be bound to the VHOST_SET_VRING_CALL instead of

vhost_vdpa_setup_vq_irq() which could be called by set_status().

Fixing this by setting up irq bypass producer's token when handling

VHOST_SET_VRING_CALL and un-registering the producer before calling

vhost_vring_ioctl() to prevent a possible use after free as eventfd

could have been released in vhost_vring_ioctl(). And such registering

and unregistering will only be done if DRIVER_OK is set.

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/02e9e9366fefe461719da5d173385b6685f70319Refgit.kernel.org/stable/c/0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0Refgit.kernel.org/stable/c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2Refgit.kernel.org/stable/c/927a2580208e0f9b0b47b08f1c802b7233a7ba3cRefgit.kernel.org/stable/c/ca64edd7ae93402af2596a952e0d94d545e2b9c0Refgit.kernel.org/stable/c/ec5f1b54ceb23475049ada6e7a43452cf4df88d1Refgit.kernel.org/stable/c/fae9b1776f53aab93ab345bdbf653b991aed717dReflists.debian.org/debian-lts-announce/2025/01/msg00001.htmlReflists.debian.org/debian-lts-announce/2025/03/msg00002.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-47748?

CVE-2024-47748 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-47748?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-47748?

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-2024-47748?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-47748 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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