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Ubuntu: (Multiple Advisories) (CVE-2021-33909): Linux kernel vulnerability

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Ubuntu: (Multiple Advisories) (CVE-2021-33909): Linux kernel vulnerability

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
07/20/2021
Created
07/23/2021
Added
07/21/2021
Modified
03/22/2023

Description

fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.

Solution(s)

  • ubuntu-upgrade-linux-image-3-13-0-186-generic
  • ubuntu-upgrade-linux-image-3-13-0-186-generic-lpae
  • ubuntu-upgrade-linux-image-3-13-0-186-lowlatency
  • ubuntu-upgrade-linux-image-3-13-0-186-powerpc-e500
  • ubuntu-upgrade-linux-image-3-13-0-186-powerpc-e500mc
  • ubuntu-upgrade-linux-image-3-13-0-186-powerpc-smp
  • ubuntu-upgrade-linux-image-3-13-0-186-powerpc64-emb
  • ubuntu-upgrade-linux-image-3-13-0-186-powerpc64-smp
  • ubuntu-upgrade-linux-image-4-15-0-1078-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1092-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1097-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1106-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1109-aws
  • ubuntu-upgrade-linux-image-4-15-0-1109-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1121-azure
  • ubuntu-upgrade-linux-image-4-15-0-151-generic
  • ubuntu-upgrade-linux-image-4-15-0-151-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-151-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-1094-aws
  • ubuntu-upgrade-linux-image-4-4-0-1095-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1130-aws
  • ubuntu-upgrade-linux-image-4-4-0-212-generic
  • ubuntu-upgrade-linux-image-4-4-0-212-lowlatency
  • ubuntu-upgrade-linux-image-5-10-0-1038-oem
  • ubuntu-upgrade-linux-image-5-11-0-1012-azure
  • ubuntu-upgrade-linux-image-5-11-0-1012-kvm
  • ubuntu-upgrade-linux-image-5-11-0-1013-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1014-aws
  • ubuntu-upgrade-linux-image-5-11-0-1014-gcp
  • ubuntu-upgrade-linux-image-5-11-0-1015-raspi
  • ubuntu-upgrade-linux-image-5-11-0-1015-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-11-0-25-generic
  • ubuntu-upgrade-linux-image-5-11-0-25-generic-64k
  • ubuntu-upgrade-linux-image-5-11-0-25-generic-lpae
  • ubuntu-upgrade-linux-image-5-11-0-25-lowlatency
  • ubuntu-upgrade-linux-image-5-3-0-1042-raspi2
  • ubuntu-upgrade-linux-image-5-3-0-1045-gke
  • ubuntu-upgrade-linux-image-5-3-0-76-generic
  • ubuntu-upgrade-linux-image-5-3-0-76-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1021-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1041-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1044-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1049-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1049-gke
  • ubuntu-upgrade-linux-image-5-4-0-1052-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1054-aws
  • ubuntu-upgrade-linux-image-5-4-0-1055-azure
  • ubuntu-upgrade-linux-image-5-4-0-80-generic
  • ubuntu-upgrade-linux-image-5-4-0-80-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-80-lowlatency
  • ubuntu-upgrade-linux-image-5-8-0-1032-raspi
  • ubuntu-upgrade-linux-image-5-8-0-1032-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-8-0-1033-kvm
  • ubuntu-upgrade-linux-image-5-8-0-1037-oracle
  • ubuntu-upgrade-linux-image-5-8-0-1038-gcp
  • ubuntu-upgrade-linux-image-5-8-0-1039-azure
  • ubuntu-upgrade-linux-image-5-8-0-1041-aws
  • ubuntu-upgrade-linux-image-5-8-0-63-generic
  • ubuntu-upgrade-linux-image-5-8-0-63-generic-64k
  • ubuntu-upgrade-linux-image-5-8-0-63-generic-lpae
  • ubuntu-upgrade-linux-image-5-8-0-63-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-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-generic-lts-xenial
  • ubuntu-upgrade-linux-image-generic-pae
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-3
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-3
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • ubuntu-upgrade-linux-image-highbank
  • 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-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-lowlatency-pae
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-omap
  • 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-powerpc-e500
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • 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-raspi2-hwe-18-04
  • ubuntu-upgrade-linux-image-server
  • 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
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

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