Out-of-Bounds Affecting kernel-debug-core package, versions <0:4.18.0-372.9.1.el8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-4267834
- published 23 Dec 2021
- disclosed 17 May 2021
Introduced: 17 May 2021
CVE-2021-4157 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-core 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-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.
References
- https://access.redhat.com/security/cve/CVE-2021-4157
- https://access.redhat.com/errata/RHSA-2022:1988
- https://bugzilla.redhat.com/show_bug.cgi?id=2034342
- https://lore.kernel.org/lkml/20210517140244.822185482@linuxfoundation.org/
- https://security.netapp.com/advisory/ntap-20220602-0007/
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://lore.kernel.org/lkml/20210517140244.822185482%40linuxfoundation.org/