CVE-2024-49974NFSD: Limit the number of concurrent async COPY operations
- 5.5MediumCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 80% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 19 months later
· 19 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 80% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < 9e52ff544e0bfa09ee339fd7b0937ee3c080c24e
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < 43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < 7ea9260874b779637aff6d24c344b8ef4ac862a0
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < ae267989b7b7933dfedcd26468d0a88fc3a9da9e
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < b4e21431a0db4854b5023cd5af001be557e6c3db
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < 6a488ad7745b8f64625c6d3a24ce7e448e83f11b
- affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 – < aadc3bbea163b6caaaebfdd2b6c4667fbc726752
- affected 4.20
- unaffected < 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.*
- unaffected 6.10.14 – ≤ 6.10.*
- unaffected 6.11.3 – ≤ 6.11.*
- unaffected 6.12 – ≤ *
References
References9
- https://git.kernel.org/stable/c/9e52ff544e0bfa09ee339fd7b0937ee3c080c24e (opens in a new tab)
- https://git.kernel.org/stable/c/43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf (opens in a new tab)
- https://git.kernel.org/stable/c/7ea9260874b779637aff6d24c344b8ef4ac862a0 (opens in a new tab)
- https://git.kernel.org/stable/c/ae267989b7b7933dfedcd26468d0a88fc3a9da9e (opens in a new tab)
- https://git.kernel.org/stable/c/b4e21431a0db4854b5023cd5af001be557e6c3db (opens in a new tab)
- https://git.kernel.org/stable/c/6a488ad7745b8f64625c6d3a24ce7e448e83f11b (opens in a new tab)
- https://git.kernel.org/stable/c/aadc3bbea163b6caaaebfdd2b6c4667fbc726752 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-43856 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-49974)Record last updated .