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CVE-2021-38199

Published: 8 August 2021

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.

From the Ubuntu security team

Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly order connection setup operations. An attacker controlling a remote NFS server could use this to cause a denial of service on the client.

Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
linux-hwe
Launchpad, Ubuntu, Debian
bionic Ignored
(replaced by linux-hwe-5.4)
focal Does not exist

hirsute Does not exist

trusty Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
xenial
Released (4.15.0-162.170~16.04.1)
jammy Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-87.98~18.04.1)
jammy Does not exist

linux-hwe-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
focal Ignored
(was pending [5.8.0-67.75] now end-of-life)
jammy Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-hwe-5.4)
focal Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
impish Does not exist

jammy Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
trusty Not vulnerable
(4.4.0-13.29~14.04.1)
jammy Does not exist

linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1115.122)
focal
Released (5.4.0-1057.60)
trusty Not vulnerable
(4.4.0-1002.2)
impish Not vulnerable
(5.13.0-1005.6)
upstream
Released (5.14~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
hirsute
Released (5.11.0-1019.20)
jammy Not vulnerable
(5.13.0-1005.6)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.4)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1057.60~18.04.1)
jammy Does not exist

linux-aws-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

trusty Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
xenial
Released (4.15.0-1115.122~16.04.1)
jammy Does not exist

linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
impish Not vulnerable
(5.13.0-1004.5)
upstream
Released (5.14~rc1)
trusty
Released (4.15.0-1126.139~14.04.1)
xenial
Released (4.15.0-1126.139~16.04.1)
hirsute
Released (5.11.0-1017.18)
focal
Released (5.4.0-1059.62)
jammy Not vulnerable
(5.13.0-1006.7)
linux-azure-4.15
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

bionic
Released (4.15.0-1126.139)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.4)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1059.62~18.04.1)
jammy Does not exist

linux-azure-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.8.0-1043.46~20.04.1)
jammy Does not exist

linux-bluefield
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.4.0-1019.22)
jammy Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic
Released (4.15.0-1030.35)
jammy Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
trusty Does not exist

xenial Does not exist

impish Does not exist

jammy Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
trusty Does not exist

impish Not vulnerable
(5.13.0-1003.4)
upstream
Released (5.14~rc1)
xenial
Released (4.15.0-1111.125~16.04.1)
focal
Released (5.4.0-1053.57)
hirsute
Released (5.11.0-1020.22)
jammy Not vulnerable
(5.13.0-1005.6)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

bionic
Released (4.15.0-1111.125)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.4)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1053.57~18.04.1)
jammy Does not exist

linux-gcp-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Ignored
(reached end of standard support)
impish Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.4.0-1053.56)
jammy Not vulnerable
(5.15.0-1002.2)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1053.56~18.04.1)
jammy Does not exist

linux-gkeop
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.4.0-1024.25)
jammy Needs triage

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1024.25~18.04.1)
jammy Does not exist

linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.4)
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1055.59~18.04.1)
jammy Does not exist

linux-oracle-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-oem
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
bionic Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
impish Does not exist

jammy Does not exist

linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
focal Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Does not exist

impish Does not exist

jammy Does not exist

linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.10.0-1049.51)
hirsute Does not exist

upstream
Released (5.14~rc1)
trusty Does not exist

xenial Does not exist

impish Does not exist

jammy Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
bionic Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Does not exist

impish Does not exist

jammy Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

xenial Does not exist

impish Not vulnerable
(5.13.0-1007.8)
upstream
Released (5.14~rc1)
focal
Released (5.4.0-1044.48)
hirsute
Released (5.11.0-1019.20)
jammy Not vulnerable
(5.13.0-1008.9)
linux-raspi2
Launchpad, Ubuntu, Debian
focal Ignored
(replaced by linux-raspi)
hirsute Does not exist

trusty Does not exist

xenial Ignored
(was needs-triage now end-of-life)
impish Does not exist

bionic
Released (4.15.0-1098.104)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (5.4.0-1044.48~18.04.1)
jammy Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute
Released (5.11.0-1020.21)
focal Ignored
(was needs-triage now end-of-life)
trusty Does not exist

xenial Does not exist

impish Not vulnerable
(5.13.0-1003.3)
upstream
Released (5.14~rc1)
jammy Not vulnerable
(5.13.0-1004.4)
linux-riscv-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
focal Does not exist

hirsute Does not exist

trusty Does not exist

xenial Ignored
(was needs-triage now end-of-life)
impish Does not exist

upstream
Released (5.14~rc1)
bionic
Released (4.15.0-1115.124)
jammy Does not exist

linux-hwe-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.11.0-37.41~20.04.2)
jammy Does not exist

linux-riscv-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.11.0-1020.21~20.04.1)
jammy Does not exist

linux
Launchpad, Ubuntu, Debian
trusty Not vulnerable
(3.11.0-12.19)
xenial Not vulnerable
(4.4.0-2.16)
impish Not vulnerable
(5.13.0-16.16)
upstream
Released (5.14~rc1)
bionic
Released (4.15.0-162.170)
focal
Released (5.4.0-88.99)
hirsute
Released (5.11.0-37.41)
jammy Not vulnerable
(5.13.0-19.19)
Patches:
Introduced by

5c6e5b60aae4347223f176966455010a5715b863

Fixed by dd99e9f98fbf423ff6d365b37a98e8879170f17c
linux-kvm
Launchpad, Ubuntu, Debian
trusty Does not exist

impish Not vulnerable
(5.13.0-1002.2)
focal
Released (5.4.0-1047.49)
upstream
Released (5.14~rc1)
bionic
Released (4.15.0-1102.104)
xenial Not vulnerable
(4.4.0-1004.9)
hirsute
Released (5.11.0-1017.18)
jammy Not vulnerable
(5.13.0-1004.4)
linux-oracle
Launchpad, Ubuntu, Debian
trusty Does not exist

impish Not vulnerable
(5.13.0-1008.10)
upstream
Released (5.14~rc1)
bionic
Released (4.15.0-1083.91)
xenial
Released (4.15.0-1083.91~16.04.1)
focal
Released (5.4.0-1055.59)
hirsute
Released (5.11.0-1019.20)
jammy Not vulnerable
(5.13.0-1008.10)
linux-oem-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.13.0-1014.18)
jammy Does not exist

linux-aws-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

focal
Released (5.11.0-1019.20~20.04.1)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-azure-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

focal
Released (5.11.0-1017.18~20.04.1)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-oracle-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.14~rc1)
focal
Released (5.11.0-1019.20~20.04.1)
jammy Does not exist

linux-ibm
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

focal
Released (5.4.0-1005.6)
upstream
Released (5.14~rc1)
jammy Not vulnerable
(5.15.0-1002.2)
linux-gcp-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal
Released (5.11.0-1020.22~20.04.1)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-oem-5.14
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.14.0-1004.4)
hirsute Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-intel-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

focal Not vulnerable
(5.13.0-1007.7)
linux-azure-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-1009.10~20.04.2)
impish Does not exist

upstream
Released (5.14~rc1)
jammy Does not exist

linux-hwe-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-21.21~20.04.1)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-aws-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.2)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-fips
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.14~rc1)
xenial Not vulnerable
(4.4.0-1074.80)
jammy Does not exist

linux-oracle-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1011.13~20.04.2)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-gcp-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.3)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1010.11~18.04.2)
upstream
Released (5.14~rc1)
jammy Does not exist

linux-azure-fde
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.4.0-1063.66+cvm2.2)
upstream
Released (5.14~rc1)
jammy Needs triage

linux-lowlatency
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable
(5.15.0-22.22)
upstream
Released (5.14~rc1)
linux-oem-5.17
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable
(5.17.0-1003.3)
upstream
Released (5.14~rc1)
linux-intel-iotg
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable

upstream Needs triage

linux-intel-iotg-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

impish Does not exist

jammy Does not exist

upstream Needs triage

linux-lowlatency-hwe-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-hwe-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-aws-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

jammy Does not exist

upstream Needs triage

focal Not vulnerable

linux-gcp-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-gke-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-azure-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage