CVE-2021-3905

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

1.98% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 79.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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 17:09Z2 YR AGO

Reserved

2021-10-26

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.1

Document digest

231381d6a4c014ba683ba1a755606007a564be4eaf4bd8b8debb0de690376f67

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2019692
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3905
• ubuntu.comhttps://ubuntu.com/security/CVE-2021-3905
• github.comhttps://github.com/openvswitch/ovs-issues/issues/226
• github.comhttps://github.com/openvswitch/ovs/commit/803ed12e31b0377c37d7aa8c94b3b92f2081e349
• security.gentoo.orgGLSA-202311-16https://security.gentoo.org/glsa/202311-16vendor-advisory