CVE-2021-20203

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

0.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 48.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-02-25 19:09Z5 YR AGO

Last updated

2024-08-03 17:30Z2 YR AGO

Reserved

2020-12-17

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

f1c2dc48332de3f382c63c8c31a35c6f641d159f5fc9427686aafc6d87880b9c

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1922441x_refsource_MISC
• bugs.launchpad.nethttps://bugs.launchpad.net/qemu/+bug/1913873x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210410 [SECURITY] [DLA 2623-1] qemu security updatehttps://lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlmailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202208-27https://security.gentoo.org/glsa/202208-27vendor-advisoryx_refsource_GENTOO
• lists.debian.org[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security updatehttps://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlmailing-listx_refsource_MLIST