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CVE-2024-46852

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: dma-buf: heaps: Fix off-by-one in CMA heap fault handler Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps:…

Published Sep 27, 2024CWE-193EPSS 0.21%

Overview

CVE-2024-46852 is a high-severity vulnerability. It was published on September 27, 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:

dma-buf: heaps: Fix off-by-one in CMA heap fault handler

Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps:

Don't track CMA dma-buf pages under RssFile") it was possible to obtain

a mapping larger than the buffer size via mremap and bypass the overflow

check in dma_buf_mmap_internal. When using such a mapping to attempt to

fault past the end of the buffer, the CMA heap fault handler also checks

the fault offset against the buffer size, but gets the boundary wrong by

1. Fix the boundary check so that we don't read off the end of the pages

array and insert an arbitrary page in the mapping.

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/79cce5e81d20fa9ad553be439d665ac3302d3c95Refgit.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2fRefgit.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbffRefgit.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87Refgit.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620eaReflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-46852?

CVE-2024-46852 is a high-severity vulnerability. It was published on September 27, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-46852?

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-2024-46852?

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-2024-46852?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-46852 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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