Rapid7 Vulnerability & Exploit Database

Ubuntu: (Multiple Advisories) (CVE-2021-45402): Linux kernel vulnerabilities

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Ubuntu: (Multiple Advisories) (CVE-2021-45402): Linux kernel vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
02/11/2022
Created
03/24/2022
Added
03/22/2022
Modified
03/22/2023

Description

The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel through v5.16-rc5 did not properly update bounds while handling the mov32 instruction, which allows local users to obtain potentially sensitive address information, aka a "pointer leak."

Solution(s)

  • ubuntu-upgrade-linux-image-5-13-0-1018-kvm
  • ubuntu-upgrade-linux-image-5-13-0-1019-aws
  • ubuntu-upgrade-linux-image-5-13-0-1021-azure
  • ubuntu-upgrade-linux-image-5-13-0-1021-gcp
  • ubuntu-upgrade-linux-image-5-13-0-1022-raspi
  • ubuntu-upgrade-linux-image-5-13-0-1022-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-13-0-1023-oracle
  • ubuntu-upgrade-linux-image-5-13-0-1025-oracle
  • ubuntu-upgrade-linux-image-5-13-0-37-generic
  • ubuntu-upgrade-linux-image-5-13-0-37-generic-64k
  • ubuntu-upgrade-linux-image-5-13-0-37-generic-lpae
  • ubuntu-upgrade-linux-image-5-13-0-37-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

  • https://attackerkb.com/topics/cve-2021-45402
  • CVE - 2021-45402
  • CVE-2021-45402
  • USN-5278-1
  • USN-5294-1
  • USN-5294-2
  • USN-5297-1
  • USN-5298-1
  • USN-5302-1
  • USN-5337-1
  • USN-5338-1
  • USN-5339-1
  • USN-5343-1
  • USN-5346-1
  • USN-5353-1
  • USN-5357-1
  • USN-5357-2
  • USN-5358-1
  • USN-5358-2
  • USN-5362-1
  • USN-5368-1
  • USN-5377-1
  • USN-5385-1
  • USN-5467-1
View more

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;