CVE-2021-38199

MEDIUM

Linux Kernel < 5.13.4 - Denial of Service via NFSv4 Trunking Detection

Title source: llm
STIX 2.1

Description

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.

References (6)

Core 6
Core References
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210902-0010/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4978
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

Scores

CVSS v3 6.5
EPSS 0.0019
EPSS Percentile 40.5%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (7)
debian/debian_linux 9.0
debian/debian_linux 11.0
linux/linux_kernel < 5.13.4
netapp/element_software
netapp/hci_bootstrap_os
netapp/hci_management_node
netapp/solidfire
Published Aug 08, 2021
Tracked Since Feb 18, 2026