Out-of-Bounds The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL8-KERNELHEADERS-4290633
- published23 Dec 2021
- disclosed17 May 2021
Introduced: 17 May 2021
CVE-2021-4157 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:8.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.
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://lore.kernel.org/lkml/20210517140244.822185482@linuxfoundation.org/
- https://bugzilla.redhat.com/show_bug.cgi?id=2034342
- https://lore.kernel.org/lkml/20210517140244.822185482%40linuxfoundation.org/
- https://security.netapp.com/advisory/ntap-20220602-0007/
- https://www.oracle.com/security-alerts/cpujul2022.html