CVE-2021-38199

moderate-risk
Published 2021-08-08

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.

Do I need to act?

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0.34% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
ADJACENT_NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Linux Netapp

References (12)

Mailing List https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
Patch https://github.com/torvalds/linux/commit/dd99e9f98fbf423ff6d365b37a98e8879170f17...
Mailing List https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20210902-0010/
Third Party Advisory https://www.debian.org/security/2021/dsa-4978
Mailing List https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
Patch https://github.com/torvalds/linux/commit/dd99e9f98fbf423ff6d365b37a98e8879170f17...
Mailing List https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20210902-0010/
Third Party Advisory https://www.debian.org/security/2021/dsa-4978
36
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 1/34 · Minimal
Exposure 14/34 · Moderate