CVE-2021-20304

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

1.89% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 78.0% of scored records. A rank, not a probability.

NVD base score

7.5 (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: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

2022-08-23 00:00Z4 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-190Integer Overflow or WraparoundBase

Data version

5.1

Document digest

181a16c9d3de268888f4aa96eb43ce2faed23fdec0f4bcf8b01a0543251bbd08

• bugs.chromium.orghttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26229
• github.comhttps://github.com/AcademySoftwareFoundation/openexr/pull/849
• github.comhttps://github.com/AcademySoftwareFoundation/openexr/commit/51a92d67f53c08230734e74564c807043cbfe41e
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1939157
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-20304
• security.gentoo.orgGLSA-202210-31https://security.gentoo.org/glsa/202210-31vendor-advisory