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CVE-2021-3847

Date: April 1, 2022

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.

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2021-3847
https://bugzilla.redhat.com/show_bug.cgi?id=2009704
https://www.openwall.com/lists/oss-security/2021/10/14/3
https://access.redhat.com/security/cve/CVE-2021-3847
https://security-tracker.debian.org/tracker/CVE-2021-3847
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3847
https://www.mend.io/vulnerability-database/CVE-2021-3847

Severity Score

Weakness Type (CWE)

Improper Preservation of Permissions

CWE-281

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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