Use After Free Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-348.20.1.rt7.150.el8_5
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUGKVM-2323201
- published 22 Dec 2021
- disclosed 14 Dec 2021
Introduced: 14 Dec 2021
CVE-2021-4154 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-debug-kvm to version 0:4.18.0-348.20.1.rt7.150.el8_5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.
References
- https://access.redhat.com/security/cve/CVE-2021-4154
- https://access.redhat.com/errata/RHSA-2022:0819
- https://bugzilla.redhat.com/show_bug.cgi?id=2034514
- https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975b
- https://security.netapp.com/advisory/ntap-20220225-0004/