CVE-2021-28021

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

1.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 71.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-10-15 00:00Z4 YR AGO

Last updated

2024-08-03 21:33Z2 YR AGO

Reserved

2021-03-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase
• CWE-125Out-of-bounds ReadBase

Data version

5.1

Document digest

d5425f4ea84269b151f9da19c91dd0d2d701b7d096206f5f28bce4526150beb9

• github.comhttps://github.com/nothings/stb/issues/1108
• lists.fedoraproject.orgFEDORA-2021-001f25d986https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2M5CRSGPRF7G3YB5CLU4FXW7ANNHAYT/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-f8ba4a690ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEGXBDEMTFGINETMJENBZ6SCHVEJQJSY/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-3fc69d203chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VP2YEXEAJWI76FPM7D7VXHWD3WESQEYC/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-8ea648186chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TDGZFLBOP27LZKLH45WQLSNPSPP7S7Z/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-16d848834dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AF2CNP4FVC6LDKNOO4WDCGNDYIP3MPK6/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-832689aa6bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXX76TJMZBPN3NU542MGN6B7C7QHRFGB/vendor-advisory
• lists.debian.org[debian-lts-announce] 20230131 [SECURITY] [DLA 3305-1] libstb security updatehttps://lists.debian.org/debian-lts-announce/2023/01/msg00045.htmlmailing-list