CVE-2021-3492
HIGH
8.8
CVSS Severity Score
Vulnerability Description
Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.
Affected Platforms (CPE)
💻
Canonical
Ubuntu Linux
< 18.04💻
Canonical
Ubuntu Linux
>= 18.04.1 and < 20.04💻
Canonical