CVE-2021-30475

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

2.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 81.1% 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

2021-06-04 00:00Z5 YR AGO

Last updated

2024-08-03 22:32Z2 YR AGO

Reserved

2021-04-08

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

Data version

5.1

Document digest

0b20dac9dc2e33a64b303e598974e862ac34b655ad021b425e367a14b68cc59a

• bugs.chromium.orghttps://bugs.chromium.org/p/aomedia/issues/detail?id=2999
• aomedia.googlesource.comhttps://aomedia.googlesource.com/aom/+/12adc723acf02633595a4d8da8345742729f46c0
• lists.fedoraproject.orgFEDORA-2021-1c3f7963a5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXCI33HXH6YSOGC2LPE2REQLMIDH6US4/vendor-advisory
• lists.debian.org[debian-lts-announce] 20230905 [SECURITY] [DLA 3556-1] aom security updatehttps://lists.debian.org/debian-lts-announce/2023/09/msg00003.htmlmailing-list
• www.debian.orgDSA-5490https://www.debian.org/security/2023/dsa-5490vendor-advisory
• security.gentoo.orgGLSA-202401-32https://security.gentoo.org/glsa/202401-32vendor-advisory