What’s Vulnerable › Vulnerabilities

CVE-2021-20299

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-16 · updated 2026-06-17
• Weakness: CWE-476

Description

A flaw was found in OpenEXR's Multipart input file functionality. A crafted multi-part input file with no actual parts can trigger a NULL pointer dereference. 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=25740
• https://bugzilla.redhat.com/show_bug.cgi?id=1939154
• https://github.com/AcademySoftwareFoundation/openexr/commit/25e9515b06a6bc293d871622b8cafaee7af84e0f
• https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25740
• https://bugzilla.redhat.com/show_bug.cgi?id=1939154
• https://github.com/AcademySoftwareFoundation/openexr/commit/25e9515b06a6bc293d871622b8cafaee7af84e0f
• https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html

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