Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2024-26943

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: handle kcalloc() allocation failure The kcalloc() in nouveau_dmem_evict_chunk() will return null if the physical…

Published May 1, 2024CWE-476EPSS 0.22%

Overview

CVE-2024-26943 is a medium-severity vulnerability. It was published on May 1, 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:

nouveau/dmem: handle kcalloc() allocation failure

The kcalloc() in nouveau_dmem_evict_chunk() will return null if

the physical memory has run out. As a result, if we dereference

src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs

will happen.

Moreover, the GPU is going away. If the kcalloc() fails, we could not

evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL

flag in kcalloc().

Finally, as there is no need to have physically contiguous memory,

this patch switches kcalloc() to kvcalloc() in order to avoid

failing allocations.

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/16e87fe23d4af6df920406494ced5c0f4354567bRefgit.kernel.org/stable/c/2a84744a037b8a511d6a9055f3defddc28ff4a4dRefgit.kernel.org/stable/c/3e82f7383e0b82a835e6b6b06a348b2bc4e2c2eeRefgit.kernel.org/stable/c/5e81773757a95fc298e96cfd6d4700f07b6192a2Refgit.kernel.org/stable/c/9acfd8b083a0ffbd387566800d89f55058a68af2Refgit.kernel.org/stable/c/16e87fe23d4af6df920406494ced5c0f4354567bRefgit.kernel.org/stable/c/2a84744a037b8a511d6a9055f3defddc28ff4a4dRefgit.kernel.org/stable/c/3e82f7383e0b82a835e6b6b06a348b2bc4e2c2eeRefgit.kernel.org/stable/c/5e81773757a95fc298e96cfd6d4700f07b6192a2Refgit.kernel.org/stable/c/9acfd8b083a0ffbd387566800d89f55058a68af2

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26943?

CVE-2024-26943 is a medium-severity vulnerability. It was published on May 1, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26943?

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-2024-26943?

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-2024-26943?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26943 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.

Related MEDIUM CVEs from 2024

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999