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CVE-2024-56712

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix memory leak on last export_udmabuf() error path In export_udmabuf(), if dma_buf_fd() fails because the FD table is…

Published Dec 29, 2024CWE-401EPSS 0.19%

Overview

CVE-2024-56712 is a medium-severity vulnerability. It was published on December 29, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

udmabuf: fix memory leak on last export_udmabuf() error path

In export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a

dma_buf owning the udmabuf has already been created; but the error handling

in udmabuf_create() will tear down the udmabuf without doing anything about

the containing dma_buf.

This leaves a dma_buf in memory that contains a dangling pointer; though

that doesn't seem to lead to anything bad except a memory leak.

Fix it by moving the dma_buf_fd() call out of export_udmabuf() so that we

can give it different error handling.

Note that the shape of this code changed a lot in commit 5e72b2b41a21

("udmabuf: convert udmabuf driver to use folios"); but the memory leak

seems to have existed since the introduction of udmabuf.

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/c9fc8428d4255c2128da9c4d5cd92e554d0150cfRefgit.kernel.org/stable/c/f49856f525acd5bef52ae28b7da2e001bbe7439e

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56712?

CVE-2024-56712 is a medium-severity vulnerability. It was published on December 29, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56712?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56712?

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-2024-56712?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56712 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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