What’s Vulnerable › Vulnerabilities

CVE-2021-20304

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-08-23 · updated 2026-06-17
• Weakness: CWE-190

Description

A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability.

Affected products

• AcademySoftwareFoundation openexr: through 2.5.7

References

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

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