CVE-2021-3847 — Improper Preservation of Permissions in Kernel
Severity
7.8HIGHNVD
EPSS
0.0%
top 91.53%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 1
Latest updateJul 27
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages7 packages
Also affects: Fedora 34
🔴Vulnerability Details
2GHSA▶
GHSA-m6pr-c5vr-9466: 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 co↗2022-04-03
OSV▶
CVE-2021-3847: 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 co↗2022-04-01
📋Vendor Advisories
3Microsoft▶
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 anot↗2022-04-12
Debian▶
CVE-2021-3847: linux - An unauthorized access to the execution of the setuid file with capabilities fla...↗2021