CVE intelligence

CVE-2024-49974

Vulnerability intelligence

Published Oct 21, 2024Sources checked Oct 24, 2026

5.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2024-49974 and is rated Medium severity with a CVSS score of 5.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 12, 2026

CBL-Mariner Releases

Vendor-listed releases

5.15.176.3-1
6.6.64.2-9

CISA KEVNot listedBased on the latest collected catalog

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2024-49974?

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.

Source: NVD