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Ubuntu: (Multiple Advisories) (CVE-2021-26931): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-26931): Linux kernel vulnerabilities

Severity
2
CVSS
(AV:L/AC:M/Au:N/C:N/I:N/A:P)
Published
02/17/2021
Created
04/15/2021
Added
04/14/2021
Modified
03/22/2023

Description

An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as used in Xen. Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions), it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. This affects drivers/block/xen-blkback/blkback.c and drivers/xen/xen-scsiback.c.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1018-dell300x
  • ubuntu-upgrade-linux-image-4-15-0-1071-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1085-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1091-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1099-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1102-aws
  • ubuntu-upgrade-linux-image-4-15-0-1102-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1114-azure
  • ubuntu-upgrade-linux-image-4-15-0-143-generic
  • ubuntu-upgrade-linux-image-4-15-0-143-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-143-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-1090-aws
  • ubuntu-upgrade-linux-image-4-4-0-1091-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1126-aws
  • ubuntu-upgrade-linux-image-4-4-0-1150-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1154-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-208-generic
  • ubuntu-upgrade-linux-image-4-4-0-208-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-208-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-208-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-208-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-208-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-208-powerpc64-smp
  • ubuntu-upgrade-linux-image-5-4-0-1013-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1033-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1037-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1040-gke
  • ubuntu-upgrade-linux-image-5-4-0-1041-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1042-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1043-aws
  • ubuntu-upgrade-linux-image-5-4-0-1044-azure
  • ubuntu-upgrade-linux-image-5-4-0-71-generic
  • ubuntu-upgrade-linux-image-5-4-0-71-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-71-lowlatency
  • ubuntu-upgrade-linux-image-5-8-0-1024-raspi
  • ubuntu-upgrade-linux-image-5-8-0-1024-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-8-0-1027-kvm
  • ubuntu-upgrade-linux-image-5-8-0-1029-oracle
  • ubuntu-upgrade-linux-image-5-8-0-1031-gcp
  • ubuntu-upgrade-linux-image-5-8-0-1032-azure
  • ubuntu-upgrade-linux-image-5-8-0-1033-aws
  • ubuntu-upgrade-linux-image-5-8-0-53-generic
  • ubuntu-upgrade-linux-image-5-8-0-53-generic-64k
  • ubuntu-upgrade-linux-image-5-8-0-53-generic-lpae
  • ubuntu-upgrade-linux-image-5-8-0-53-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-dell300x
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • 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-lpae-lts-xenial
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • 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-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-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • 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-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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