High severity7.8NVD Advisory· Published Apr 1, 2022· Updated Jun 17, 2026
CVE-2021-3847
CVE-2021-3847
Description
An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system.
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Affected products
2Patches
Vulnerability mechanics
References
2- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- www.openwall.com/lists/oss-security/2021/10/14/3nvdMailing ListThird Party Advisory
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