CVE-2024-49974

MEDIUM EPSS 19.1%
Published Oct 21, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
19.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel* <6.10.14
linuxlinux_kernel*≥6.11  –  <6.11.3

References 9

  • git.kernel.org https://git.kernel.org/stable/c/43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf
  • git.kernel.org https://git.kernel.org/stable/c/6a488ad7745b8f64625c6d3a24ce7e448e83f11b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ea9260874b779637aff6d24c344b8ef4ac862a0
  • git.kernel.org https://git.kernel.org/stable/c/9e52ff544e0bfa09ee339fd7b0937ee3c080c24e
  • git.kernel.org https://git.kernel.org/stable/c/aadc3bbea163b6caaaebfdd2b6c4667fbc726752
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae267989b7b7933dfedcd26468d0a88fc3a9da9e
  • git.kernel.org https://git.kernel.org/stable/c/b4e21431a0db4854b5023cd5af001be557e6c3db
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/6a488ad7745b8f64625c6d3a24ce7e448e83f11b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aadc3bbea163b6caaaebfdd2b6c4667fbc726752
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4e21431a0db4854b5023cd5af001be557e6c3db
    Patch