Use After Free Affecting kernel-debug-modules package, versions <0:4.18.0-305.34.2.el8_4
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-4174029
- 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 RHEL:8 kernel-debug-modules to version 0:4.18.0-305.34.2.el8_4 or higher.
This issue was patched in RHSA-2022:0186.
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.
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://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/