NFSD: Limit the number of concurrent async COPY operations (Linux Linux)

CVE-2024-49974
MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.27 % · percentile 20 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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.

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 < 9e52ff544e0bfa09ee339fd7b0937ee3c080c24e ; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 < 43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf ; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 < 7ea9260874b779637aff6d24c344b8ef4ac862a0 ; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 < ae267989b7b7933dfedcd26468d0a88fc3a9da9e ; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 < b4e21431a0db4854b5023cd5af001be557e6c3db ; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 < 6a488ad7745b8f64625c6d3a24ce7e448e83f11b
Linux · Linuxaffected 4.20 ; unaffected 0 < 4.20 ; unaffected 5.10.231 ≤ 5.10.* ; unaffected 5.15.174 ≤ 5.15.* ; unaffected 6.1.119 ≤ 6.1.* ; unaffected 6.6.63 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD