NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers (opens in a new tab)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-KERNELCROSSHEADERS-4064541
- published26 Jul 2021
- disclosed29 Apr 2021
Introduced: 29 Apr 2021
CVE-2021-3543 (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-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.
References
- https://access.redhat.com/security/cve/CVE-2021-3543
- https://bugzilla.redhat.com/show_bug.cgi?id=1953022
- https://lore.kernel.org/lkml/20210429165941.27020-1-andraprs@amazon.com/
- https://access.redhat.com/errata/RHSA-2021:2168
- https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs@amazon.com/
- https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs%40amazon.com/