CVE-2021-20255

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

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 35.0% 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

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

2021-03-09 19:14Z5 YR AGO

Last updated

2024-08-03 17:37Z2 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-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
• CWE-674Uncontrolled RecursionClass

Data version

5.1

Document digest

725bc35e0d66f20e156bf327a9b05772dbd5f23b728ea9394016220c9021ce52

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1930646x_refsource_MISC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2021/02/25/1x_refsource_MISC
• ruhr-uni-bochum.sciebo.dehttps://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1x_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.netapp.comhttps://security.netapp.com/advisory/ntap-20210507-0003/x_refsource_CONFIRM