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Ubuntu: (Multiple Advisories) (CVE-2020-12826): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-12826): Linux kernel vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/12/2020
Created
05/27/2020
Added
05/25/2020
Modified
03/22/2023

Description

A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.

Solution(s)

  • ubuntu-upgrade-linux-image-4-4-0-1073-aws
  • ubuntu-upgrade-linux-image-4-4-0-1075-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1109-aws
  • ubuntu-upgrade-linux-image-4-4-0-1134-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1138-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-184-generic
  • ubuntu-upgrade-linux-image-4-4-0-184-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-184-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-184-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-184-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-184-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-184-powerpc64-smp
  • ubuntu-upgrade-linux-image-5-3-0-1017-kvm
  • ubuntu-upgrade-linux-image-5-3-0-1018-oracle
  • ubuntu-upgrade-linux-image-5-3-0-1019-aws
  • ubuntu-upgrade-linux-image-5-3-0-1020-gcp
  • ubuntu-upgrade-linux-image-5-3-0-1020-gke
  • ubuntu-upgrade-linux-image-5-3-0-1022-azure
  • ubuntu-upgrade-linux-image-5-3-0-1025-raspi2
  • ubuntu-upgrade-linux-image-5-3-0-53-generic
  • ubuntu-upgrade-linux-image-5-3-0-53-generic-lpae
  • ubuntu-upgrade-linux-image-5-3-0-53-lowlatency
  • ubuntu-upgrade-linux-image-5-3-0-53-snapdragon
  • ubuntu-upgrade-linux-image-5-4-0-1011-aws
  • ubuntu-upgrade-linux-image-5-4-0-1011-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1011-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1011-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1011-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1012-azure
  • ubuntu-upgrade-linux-image-5-4-0-26-generic
  • ubuntu-upgrade-linux-image-5-4-0-31-generic
  • ubuntu-upgrade-linux-image-5-4-0-31-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-31-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-edge
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-edge
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-edge
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • 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-5-3
  • ubuntu-upgrade-linux-image-gkeop-5-3
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc-smp-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-emb-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-powerpc64-smp-lts-xenial
  • ubuntu-upgrade-linux-image-raspi
  • 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-18-04
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

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