CVE-2021-3420

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

2.10% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 81.6% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/I:H/A:H

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2021-03-05 19:19Z5 YR AGO

Last updated

2024-08-03 16:53Z2 YR AGO

Reserved

2021-03-02

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-190Integer Overflow or WraparoundBase

Data version

5.1

Document digest

3c7cc6be67d85c914a3a20422236368fcc5d6f176bbeeea92335d389c3ea8b3e

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1934088x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-332fb9c796https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEBF6YHWFNCBW5A2ENSQ3Z56ELF4MTRE/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-267c08cc40https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQZEUANAWBBAOC4TF5PTPJVLMUR7SFD/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-0fa2f42d3chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AMK54N6UOPBFFX2YT32TWSAEFTHGSKAA/vendor-advisoryx_refsource_FEDORA