Information Exposure The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-RHEL8-KERNELHEADERS-1568582
- published23 Aug 2021
- disclosed12 Aug 2021
Introduced: 12 Aug 2021
CVE-2021-3732 (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.
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.
References
- https://access.redhat.com/security/cve/CVE-2021-3732
- https://access.redhat.com/errata/RHSA-2021:4356
- https://bugzilla.redhat.com/show_bug.cgi?id=1995249
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631
- https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631
- https://ubuntu.com/security/CVE-2021-3732