CVE-2021-38199

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Summary

CVECVE-2021-38199
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-08-08 20:15:07 UTC
Updated2026-10-08 21:17:39 UTC
Descriptionfs/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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.012450000 probability, percentile 0.684380000 (date 2026-10-10)

Problem Types: NVD-CWE-noinfo | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary3.3AV:A/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Adjacent
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 11.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Linux Linux Kernel All All All All
Application Netapp Element Software - All All All
Operating System Netapp Hci Bootstrap Os - All All All
Hardware Netapp Hci Compute Node - All All All
Application Netapp Hci Management Node - All All All
Hardware Netapp Hci Storage Node - All All All
Application Netapp Solidfire - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Debian -- Security Information -- DSA-4978-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
August 2021 Linux Kernel 5.13.4 Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] [DLA 2785-1] linux-4.19 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
NFSv4: Initialise connection to the server in nfs4_alloc_client() · torvalds/linux@dd99e9f · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 af854a3a-2127-422b-91ae-364da2661108 cdn.kernel.org Mailing List, Patch, Vendor Advisory
[SECURITY] [DLA 2843-1] linux security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 178809 Debian Security Update for linux (DSA 4978-1)
  • 178844 Debian Security Update for linux-4.19 (DLA 2785-1)
  • 178943 Debian Security Update for linux (DLA 2843-1)
  • 179784 Debian Security Update for linux (CVE-2021-38199)
  • 198514 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5091-1)
  • 198515 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5092-1)
  • 198521 Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-5091-2)
  • 198523 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5092-2)
  • 198524 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5096-1)
  • 198533 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5106-1)
  • 198548 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-5120-1)
  • 198562 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5136-1)
  • 353145 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-006
  • 353156 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-004
  • 353184 Amazon Linux Security Advisory for kernel : ALAS-2022-1571
  • 353195 Amazon Linux Security Advisory for kernel : ALAS2-2022-1761
  • 353242 Amazon Linux Security Advisory for kernel : ALAC2012-2022-036
  • 353243 Amazon Linux Security Advisory for kmod-mlx5 : ALAC2012-2022-037
  • 353244 Amazon Linux Security Advisory for kmod-sfc : ALAC2012-2022-038
  • 671134 EulerOS Security Update for kernel (EulerOS-SA-2021-2688)
  • 671135 EulerOS Security Update for kernel (EulerOS-SA-2021-2636)
  • 671137 EulerOS Security Update for kernel (EulerOS-SA-2021-2713)
  • 671181 EulerOS Security Update for kernel (EulerOS-SA-2021-2934)
  • 900294 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1
  • 901711 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (6583-1)
  • 903339 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (5074)
  • 906078 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (5074-1)

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