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CVE-2024-49974

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: NFSD: Limit the number of concurrent async COPY operations Nothing appears to limit the number of concurrent async COPY operati…

Published Oct 21, 2024EPSS 0.27%

Overview

CVE-2024-49974 is a medium-severity vulnerability. It was published on October 21, 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:

NFSD: Limit the number of concurrent async COPY operations

Nothing appears to limit the number of concurrent async COPY

operations that clients can start. In addition, AFAICT each async

COPY can copy an unlimited number of 4MB chunks, so can run for a

long time. Thus IMO async COPY can become a DoS vector.

Add a restriction mechanism that bounds the number of concurrent

background COPY operations. Start simple and try to be fair -- this

patch implements a per-namespace limit.

An async COPY request that occurs while this limit is exceeded gets

NFS4ERR_DELAY. The requesting client can choose to send the request

again after a delay or fall back to a traditional read/write style

copy.

If there is need to make the mechanism more sophisticated, we can

visit that in future patches.

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/43e46ee5efc03990b223f7aa8b77aa9c3d3acfdfRefgit.kernel.org/stable/c/6a488ad7745b8f64625c6d3a24ce7e448e83f11bRefgit.kernel.org/stable/c/7ea9260874b779637aff6d24c344b8ef4ac862a0Refgit.kernel.org/stable/c/9e52ff544e0bfa09ee339fd7b0937ee3c080c24eRefgit.kernel.org/stable/c/aadc3bbea163b6caaaebfdd2b6c4667fbc726752Refgit.kernel.org/stable/c/ae267989b7b7933dfedcd26468d0a88fc3a9da9eRefgit.kernel.org/stable/c/b4e21431a0db4854b5023cd5af001be557e6c3dbReflists.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-2024-49974?

CVE-2024-49974 is a medium-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-49974?

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-2024-49974?

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-2024-49974?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-49974 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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