CVE-2021-20302

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-04 · updated 2026-06-17
Weakness: CWE-20

Description

A flaw was found in OpenEXR's TiledInputFile functionality. This flaw allows an attacker who can submit a crafted single-part non-image to be processed by OpenEXR, to trigger a floating-point exception error. The highest threat from this vulnerability is to system availability.

Affected products

Debian Linux: 10.0
AcademySoftwareFoundation openexr: before 2.5.4 — fixed in 2.5.4

How to fix

Upgrade to a fixed version: AcademySoftwareFoundation openexr 2.5.4. Check the vendor advisory for mitigations.

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25894
https://bugzilla.redhat.com/show_bug.cgi?id=1939161
https://github.com/AcademySoftwareFoundation/openexr/pull/842
https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25894
https://bugzilla.redhat.com/show_bug.cgi?id=1939161
https://github.com/AcademySoftwareFoundation/openexr/pull/842
https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html

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