Rapid7 Vulnerability & Exploit Database

Ubuntu: (Multiple Advisories) (CVE-2021-38166): Linux kernel (OEM) vulnerabilities

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Ubuntu: (Multiple Advisories) (CVE-2021-38166): Linux kernel (OEM) vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
08/07/2021
Created
10/02/2021
Added
09/30/2021
Modified
03/22/2023

Description

In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAP_SYS_ADMIN capability.

Solution(s)

  • ubuntu-upgrade-linux-image-5-10-0-1050-oem
  • ubuntu-upgrade-linux-image-5-11-0-1018-kvm
  • ubuntu-upgrade-linux-image-5-11-0-1020-aws
  • ubuntu-upgrade-linux-image-5-11-0-1020-azure
  • ubuntu-upgrade-linux-image-5-11-0-1020-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1021-gcp
  • ubuntu-upgrade-linux-image-5-11-0-1021-raspi
  • ubuntu-upgrade-linux-image-5-11-0-1021-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-11-0-38-generic
  • ubuntu-upgrade-linux-image-5-11-0-38-generic-64k
  • ubuntu-upgrade-linux-image-5-11-0-38-generic-lpae
  • ubuntu-upgrade-linux-image-5-11-0-38-lowlatency
  • ubuntu-upgrade-linux-image-5-13-0-1014-oem
  • 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-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-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-20-04c
  • 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-2021-38166
  • CVE - 2021-38166
  • DSA-4978
  • CVE-2021-38166
  • USN-5091-1
  • USN-5091-2
  • USN-5092-1
  • USN-5092-2
  • USN-5094-1
  • USN-5094-2
  • USN-5096-1
  • USN-5113-1
  • USN-5114-1
  • USN-5115-1
  • USN-5116-1
  • USN-5116-2
  • USN-5117-1
  • USN-5120-1
  • USN-5135-1
  • USN-5136-1
  • USN-5137-1
  • USN-5137-2
  • USN-5163-1
  • USN-5164-1
  • USN-5299-1
  • USN-5343-1
  • USN-5361-1
View more

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
  • Lightweight Endpoint Agent
  • Live Dashboards
  • Real Risk Prioritization
  • IT-Integrated Remediation Projects
  • Cloud, Virtual, and Container Assessment
  • Integrated Threat Feeds
  • Easy-to-Use RESTful API
  • Automation-Assisted Patching
  • Automated Containment
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

;