Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before 9e52ff544e0bfa09ee339fd7b0937ee3c080c24e; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before 43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before 7ea9260874b779637aff6d24c344b8ef4ac862a0; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before ae267989b7b7933dfedcd26468d0a88fc3a9da9e; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before b4e21431a0db4854b5023cd5af001be557e6c3db; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before 6a488ad7745b8f64625c6d3a24ce7e448e83f11b; affected e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 before aadc3bbea163b6caaaebfdd2b6c4667fbc726752 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 5.10.231 through 5.10.*; unaffected 5.15.174 through 5.15.*; unaffected 6.1.119 through 6.1.*; unaffected 6.6.63 through 6.6.*; unaffected 6.10.14 through 6.10.*; unaffected 6.11.3 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9e52ff544e0bfa09ee339fd7b0937ee3c080c24e
- https://git.kernel.org/stable/c/43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf
- https://git.kernel.org/stable/c/7ea9260874b779637aff6d24c344b8ef4ac862a0
- https://git.kernel.org/stable/c/ae267989b7b7933dfedcd26468d0a88fc3a9da9e
- https://git.kernel.org/stable/c/b4e21431a0db4854b5023cd5af001be557e6c3db
- https://git.kernel.org/stable/c/6a488ad7745b8f64625c6d3a24ce7e448e83f11b
- https://git.kernel.org/stable/c/aadc3bbea163b6caaaebfdd2b6c4667fbc726752
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.