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Ubuntu: USN-4313-1 (CVE-2020-8835): Linux kernel vulnerability

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Ubuntu: USN-4313-1 (CVE-2020-8835): Linux kernel vulnerability

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
03/30/2020
Created
04/02/2020
Added
03/31/2020
Modified
03/22/2023

Description

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

Solution(s)

  • ubuntu-upgrade-linux-image-5-3-0-1013-oracle
  • ubuntu-upgrade-linux-image-5-3-0-1014-kvm
  • ubuntu-upgrade-linux-image-5-3-0-1015-aws
  • ubuntu-upgrade-linux-image-5-3-0-1016-gcp
  • ubuntu-upgrade-linux-image-5-3-0-1016-gke
  • ubuntu-upgrade-linux-image-5-3-0-1018-azure
  • ubuntu-upgrade-linux-image-5-3-0-1021-raspi2
  • ubuntu-upgrade-linux-image-5-3-0-45-generic
  • ubuntu-upgrade-linux-image-5-3-0-45-generic-lpae
  • ubuntu-upgrade-linux-image-5-3-0-45-lowlatency
  • ubuntu-upgrade-linux-image-5-3-0-45-snapdragon
  • ubuntu-upgrade-linux-image-aws
  • 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-gke
  • ubuntu-upgrade-linux-image-gke-5-3
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-edge
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-raspi2-hwe-18-04
  • 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

References

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