vulnerability

Amazon Linux AMI 2: CVE-2021-20321: Security patch for kernel, microvm-kernel (Multiple Advisories)

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Severity
5
CVSS
(AV:L/AC:M/Au:N/C:N/I:N/A:C)
Published
Nov 5, 2021
Added
Nov 5, 2021
Modified
May 14, 2025

Description

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

Solutions

amazon-linux-ami-2-upgrade-bpftoolamazon-linux-ami-2-upgrade-bpftool-debuginfoamazon-linux-ami-2-upgrade-kernelamazon-linux-ami-2-upgrade-kernel-debuginfoamazon-linux-ami-2-upgrade-kernel-debuginfo-common-aarch64amazon-linux-ami-2-upgrade-kernel-debuginfo-common-x86_64amazon-linux-ami-2-upgrade-kernel-develamazon-linux-ami-2-upgrade-kernel-headersamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-252-195-481amazon-linux-ami-2-upgrade-kernel-livepatch-5-10-75-79-358amazon-linux-ami-2-upgrade-kernel-toolsamazon-linux-ami-2-upgrade-kernel-tools-debuginfoamazon-linux-ami-2-upgrade-kernel-tools-develamazon-linux-ami-2-upgrade-microvm-kernelamazon-linux-ami-2-upgrade-microvm-kernel-debuginfoamazon-linux-ami-2-upgrade-microvm-kernel-debuginfo-common-aarch64amazon-linux-ami-2-upgrade-microvm-kernel-debuginfo-common-x86_64amazon-linux-ami-2-upgrade-microvm-kernel-develamazon-linux-ami-2-upgrade-microvm-kernel-headersamazon-linux-ami-2-upgrade-perfamazon-linux-ami-2-upgrade-perf-debuginfoamazon-linux-ami-2-upgrade-python-perfamazon-linux-ami-2-upgrade-python-perf-debuginfo

References

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