CVE-2021-3975

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

1.53% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 72.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/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

Low. 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

2021-11-18

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.1

Document digest

fb47d82279dd4bb3069a187d36bb4480b579aef7c0151fc6ae03ef357e19d8bf

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2024326
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3975
• ubuntu.comhttps://ubuntu.com/security/CVE-2021-3975
• github.comhttps://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20221201-0002/
• lists.debian.org[debian-lts-announce] 20240401 [SECURITY] [DLA 3778-1] libvirt security updatehttps://lists.debian.org/debian-lts-announce/2024/04/msg00000.htmlmailing-list