Bug 1992271 (CVE-2021-38199) - CVE-2021-38199 kernel: incorrect connection-setup ordering allows operators of remote NFSv4 servers to cause a DoS
Summary: CVE-2021-38199 kernel: incorrect connection-setup ordering allows operators o...
Keywords:
Status: NEW
Alias: CVE-2021-38199
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 1992272 1993211 1993212 1993213
Blocks: 1992273
TreeView+ depends on / blocked
 
Reported: 2021-08-10 20:27 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-09-26 18:22 UTC (History)
37 users (show)

Fixed In Version: Linux kernel 5.14-rc1
Clone Of:
Environment:
Last Closed:
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Description Guilherme de Almeida Suckevicz 2021-08-10 20:27:24 UTC 
fs/nfs/nfs4client.c in the NFS4 subsystem of the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.

Reference and upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dd99e9f98fbf423ff6d365b37a98e8879170f17c
Comment 1 Guilherme de Almeida Suckevicz 2021-08-10 20:27:57 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1992272]
Comment 2 Justin M. Forbes 2021-08-11 21:26:39 UTC 
This was fixed for Fedora with the 5.13.4 stable kernel updates.
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