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Medium 6.5Published Aug 8, 2021

CVE-2021-38199fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arran…

Updated under an hour ago ()

Does this affect you?

It affects linux_kernel and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.

CVSS
6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
Not given
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
mitre
NVD analysis
Modified
Record last updated
Oct 8, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
linux linux_kernel
linux:linux_kernel
before 5.13.4
NVD
netapp hci_bootstrap_os
netapp:hci_bootstrap_os
all versions
NVD
netapp hci_management_node
netapp:hci_management_node
all versions
NVD
netapp solidfire
netapp:solidfire
all versions
NVD
netapp element_software
netapp:element_software
all versions
NVD
debian debian_linux
debian:debian_linux
9.0; 11.0
NVD

References

  • x-refsource-misc
  • x-refsource-misc
  • x-refsource-confirm
  • vendor-advisory, x-refsource-debian
  • mailing-list, x-refsource-mlist
  • mailing-list, x-refsource-mlist

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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