CVE-2021-30184

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

1.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 76.1% 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

2021-04-07 11:30Z5 YR AGO

Last updated

2025-01-12 21:02Z1 YR AGO

Reserved

2021-04-07

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

a27eb13ac104375d7ad68320bec2b38699acbf3780dabb242ff41978fa43fb35

• lists.gnu.orghttps://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00000.htmlx_refsource_MISC
• lists.gnu.orghttps://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00001.htmlx_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-a58cb9bc7ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXOTMUSBVUZNA3JMPG6BU37DQW2YOJWS/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-2c714d311fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QC74RWMDLSQGV6Z3ZABNTPABB33S4YNF/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-ff3297913bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SOGPLC77ZL2FACSOE5MWDS3YH3RBNQAQ/vendor-advisoryx_refsource_FEDORA
• security.gentoo.orgGLSA-202107-28https://security.gentoo.org/glsa/202107-28vendor-advisoryx_refsource_GENTOO
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/01/msg00007.html