Improper Authentication Affecting kernel-debug-modules package, versions <0:4.18.0-372.9.1.el8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-4260151
- published 4 Jan 2022
- disclosed 12 Sep 2021
Introduced: 12 Sep 2021
CVE-2021-4197 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RHSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.
References
- https://access.redhat.com/security/cve/CVE-2021-4197
- https://access.redhat.com/errata/RHSA-2022:1988
- https://bugzilla.redhat.com/show_bug.cgi?id=2035652
- https://lore.kernel.org/lkml/20211209214707.805617-1-tj@kernel.org/T/
- https://security.netapp.com/advisory/ntap-20220602-0006/
- https://www.debian.org/security/2022/dsa-5127
- https://www.debian.org/security/2022/dsa-5173
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://lore.kernel.org/lkml/20211209214707.805617-1-tj%40kernel.org/T/