CVE-2021-3995

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 47.6% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-08-23 00:00Z4 YR AGO

Last updated

2024-08-03 17:16Z2 YR AGO

Reserved

2021-11-22

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-552Files or Directories Accessible to External PartiesBase

Data version

5.1

Document digest

b5d306c967a259c4ac89d52a872a2c06d418ef802b9e23b57eab567c48c8a553

• mirrors.edge.kernel.orghttps://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2022/01/24/2
• github.comhttps://github.com/util-linux/util-linux/commit/57202f5713afa2af20ffbb6ab5331481d0396f8d
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2024631https://access.redhat.com/security/cve/CVE-2021-3995
• www.openwall.com[oss-security] 20221130 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328)http://www.openwall.com/lists/oss-security/2022/11/30/2mailing-list
• seclists.org20221208 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328)http://seclists.org/fulldisclosure/2022/Dec/4mailing-list
• packetstormsecurity.comhttp://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20221209-0002/
• security.gentoo.orgGLSA-202401-08https://security.gentoo.org/glsa/202401-08vendor-advisory