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CVE-2020-35513

Published: 26 January 2021

A flaw incorrect umask during file or directory modification in the Linux kernel NFS (network file system) functionality was found in the way user create and delete object using NFSv4.2 or newer if both simultaneously accessing the NFS by the other process that is not using new NFSv4.2. A user with access to the NFS could use this flaw to starve the resources causing denial of service.

Priority

Low

Cvss 3 Severity Score

4.9

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.2.0-16.19)
bionic
Released (4.15.0-23.25)
focal Not vulnerable
(5.4.0-9.12)
groovy Not vulnerable
(5.4.0-26.30)
trusty Ignored
(was needs-triage ESM criteria)
Patches:
Introduced by

47057abde515155a4fee53038e7772d6b387e0aa

Fixed by 880a3a5325489a143269a8e172e7563ebf9897bc
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1010.10)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
trusty Ignored
(was needs-triage ESM criteria)
linux-aws-5.0
Launchpad, Ubuntu, Debian
groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

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(superseded by linux-aws-5.4)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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1018.18~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.15.0-1030.31~16.04.1)
bionic Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

linux-azure
Launchpad, Ubuntu, Debian
focal Not vulnerable
(5.4.0-1006.6)
groovy Not vulnerable
(5.4.0-1010.10)
upstream
Released (4.17~rc1)
xenial
Released (4.15.0-1013.13~16.04.2)
bionic Ignored
(superseded by linux-azure-5.3)
trusty Ignored
(was needs-triage ESM criteria)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1082.92)
groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

focal Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1020.20~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
trusty Does not exist

upstream
Released (4.17~rc1)
xenial
Released (4.15.0-1014.14~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1071.81)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.2)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1030.32)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1011.11~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1001.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial
Released (4.15.0-24.26~16.04.1)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-37.41~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

focal Not vulnerable
(5.8.0-23.24~20.04.1)
groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Ignored
(superseded by linux-hwe)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1011.11)
focal Not vulnerable
(5.4.0-1004.4)
groovy Not vulnerable
(5.4.0-1009.9)
trusty Does not exist

upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.4.0-1004.9)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

focal Does not exist

groovy Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

trusty Ignored
(was needs-triage ESM criteria)
linux-oem
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Ignored
(end of standard support)
bionic Ignored
(end of life, was needs-triage)
linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.6.0-1007.7)
groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

bionic Ignored
(end of standard support, was needs-triage)
linux-oracle
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1007.9)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
trusty Does not exist

upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

focal Not vulnerable
(5.4.0-1007.7)
groovy Not vulnerable
(5.4.0-1008.8)
trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1012.13)
focal Ignored
(replaced by linux-raspi)
groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.2.0-1013.19)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1017.19~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

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

groovy Not vulnerable
(5.4.0-24.28)
trusty Does not exist

upstream
Released (4.17~rc1)
xenial Does not exist

focal Ignored
(end of life, was needs-triage)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.4.0-1077.82)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (4.17~rc1)
xenial Not vulnerable
(4.4.0-1013.15)

Severity score breakdown

Parameter Value
Base score 4.9
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H