CVE-2021-38199

medium

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

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4

https://github.com/torvalds/linux/commit/dd99e9f98fbf423ff6d365b37a98e8879170f17c

https://security.netapp.com/advisory/ntap-20210902-0010/

https://www.debian.org/security/2021/dsa-4978

https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html

https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

Details

Source: MITRE

Published: 2021-08-08

Updated: 2021-12-21

Risk Information

CVSS v2

Base Score: 3.3

Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 6.5

Severity: LOW

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM