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Ubuntu: (Multiple Advisories) (CVE-2021-20321): Linux kernel regression

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Ubuntu: (Multiple Advisories) (CVE-2021-20321): Linux kernel regression

Severity
5
CVSS
(AV:L/AC:M/Au:N/C:N/I:N/A:C)
Published
12/22/2021
Created
01/08/2022
Added
01/06/2022
Modified
03/24/2022

Description

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1033-dell300x
  • ubuntu-upgrade-linux-image-4-15-0-1085-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1101-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1105-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1114-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1118-aws
  • ubuntu-upgrade-linux-image-4-15-0-1118-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1129-azure
  • ubuntu-upgrade-linux-image-4-15-0-166-generic
  • ubuntu-upgrade-linux-image-4-15-0-166-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-166-lowlatency
  • ubuntu-upgrade-linux-image-5-11-0-1021-kvm
  • ubuntu-upgrade-linux-image-5-11-0-1023-aws
  • ubuntu-upgrade-linux-image-5-11-0-1023-azure
  • ubuntu-upgrade-linux-image-5-11-0-1023-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1024-gcp
  • ubuntu-upgrade-linux-image-5-11-0-1024-raspi
  • ubuntu-upgrade-linux-image-5-11-0-1024-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-11-0-44-generic
  • ubuntu-upgrade-linux-image-5-11-0-44-generic-64k
  • ubuntu-upgrade-linux-image-5-11-0-44-generic-lpae
  • ubuntu-upgrade-linux-image-5-11-0-44-lowlatency
  • ubuntu-upgrade-linux-image-5-13-0-1007-kvm
  • ubuntu-upgrade-linux-image-5-13-0-1008-aws
  • ubuntu-upgrade-linux-image-5-13-0-1008-gcp
  • ubuntu-upgrade-linux-image-5-13-0-1009-azure
  • ubuntu-upgrade-linux-image-5-13-0-1011-oracle
  • ubuntu-upgrade-linux-image-5-13-0-1012-raspi
  • ubuntu-upgrade-linux-image-5-13-0-1012-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-13-0-1026-oem
  • ubuntu-upgrade-linux-image-5-13-0-23-generic
  • ubuntu-upgrade-linux-image-5-13-0-23-generic-64k
  • ubuntu-upgrade-linux-image-5-13-0-23-generic-lpae
  • ubuntu-upgrade-linux-image-5-13-0-23-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1010-ibm
  • ubuntu-upgrade-linux-image-5-4-0-1023-bluefield
  • ubuntu-upgrade-linux-image-5-4-0-1029-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1048-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1051-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1057-gke
  • ubuntu-upgrade-linux-image-5-4-0-1059-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1059-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1060-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1065-azure
  • ubuntu-upgrade-linux-image-5-4-0-92-generic
  • ubuntu-upgrade-linux-image-5-4-0-92-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-92-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-94-generic
  • ubuntu-upgrade-linux-image-5-4-0-94-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-94-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-aws-lts-20-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-bluefield
  • ubuntu-upgrade-linux-image-dell300x
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-gcp-lts-20-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • ubuntu-upgrade-linux-image-ibm
  • ubuntu-upgrade-linux-image-ibm-lts-20-04
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04c
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-oracle-lts-20-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-hwe-18-04
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04

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