A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Published 2022-02-18 18:15:09
Updated 2022-05-11 14:20:18
Source Red Hat, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-20321

Exploit prediction scoring system (EPSS) score for CVE-2021-20321

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20321

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.7
MEDIUM AV:L/AC:M/Au:N/C:N/I:N/A:C
3.4
6.9
NIST
4.7
MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
1.0
3.6
NIST

CWE ids for CVE-2021-20321

References for CVE-2021-20321

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