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Ubuntu: USN-4910-1 (CVE-2021-20268): Linux kernel vulnerabilities

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Ubuntu: USN-4910-1 (CVE-2021-20268): Linux kernel vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
03/09/2021
Created
04/15/2021
Added
04/14/2021
Modified
03/22/2023

Description

An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Solution(s)

  • ubuntu-upgrade-linux-image-5-8-0-1020-raspi
  • ubuntu-upgrade-linux-image-5-8-0-1020-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-8-0-1023-kvm
  • ubuntu-upgrade-linux-image-5-8-0-1025-oracle
  • ubuntu-upgrade-linux-image-5-8-0-1027-azure
  • ubuntu-upgrade-linux-image-5-8-0-1027-gcp
  • ubuntu-upgrade-linux-image-5-8-0-1028-aws
  • ubuntu-upgrade-linux-image-5-8-0-49-generic
  • ubuntu-upgrade-linux-image-5-8-0-49-generic-64k
  • ubuntu-upgrade-linux-image-5-8-0-49-generic-lpae
  • ubuntu-upgrade-linux-image-5-8-0-49-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-gcp
  • 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-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04

References

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