VULNERABILITY INTELLIGENCE
CVE-2021-3492
CVSS score8.8 HIGH
EPSS probability1.54%
CISA KEVNot currently listed
Published2021-04-17
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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.
Weakness classification
- security@ubuntu.com: CWE-401
- nvd@nist.gov: CWE-401
Primary references
- security@ubuntu.com — Third Party Advisory, VDB Entry
- security@ubuntu.com — Mailing List, Patch, Vendor Advisory
- security@ubuntu.com — Mailing List, Patch, Vendor Advisory
- security@ubuntu.com — Vendor Advisory
- security@ubuntu.com — Mailing List, Third Party Advisory
- security@ubuntu.com — Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry