Disclosure summary
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.
Source-reported weakness categories
NVD-CWE-noinfo
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2021-38199
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| linux | linux_kernel | * {"versionEndExcluding":"5.13.4"} |
| netapp | hci_bootstrap_os | - |
| netapp | hci_management_node | - |
| netapp | solidfire | - |
| netapp | element_software | - |
| debian | debian_linux | 9.0 |
| debian | debian_linux | 11.0 |
Original records & references
- NIST NVD record
- CVE Program record
- cdn.kernel.org — Mailing List, Patch, Vendor Advisory
- github.com — Patch, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
- cdn.kernel.org — Mailing List, Patch, Vendor Advisory
- github.com — Patch, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
PUBLISHED 2021-08-08T16:15:07-04:00
MODIFIED 2026-10-08T17:17:39-04:00
INGESTED 2026-10-10T20:50:20-04:00