CVE-2020-11761

CVE-2020-11761 is a medium-severity vulnerability in Openexr with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

• Severity: Medium (CVSS 3.x base score 5.5)
• CVSS v2: 4.3
• EPSS exploit prediction: 2% (76th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-125
• Affected product: Openexr
• Published: 2020-04-14
• Last modified: 2026-06-17

Description

An issue was discovered in OpenEXR before 2.4.1. There is an out-of-bounds read during Huffman uncompression, as demonstrated by FastHufDecoder::refill in ImfFastHuf.cpp.

Frequently asked questions

What is CVE-2020-11761?

An issue was discovered in OpenEXR before 2.4.1. There is an out-of-bounds read during Huffman uncompression, as demonstrated by FastHufDecoder::refill in ImfFastHuf.cpp.

How severe is CVE-2020-11761?

CVE-2020-11761 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-11761 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11761?

CVE-2020-11761 primarily affects Openexr. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-11761?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-11761 published?

CVE-2020-11761 was published on 2020-04-14 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00051.html
• https://bugs.chromium.org/p/project-zero/issues/detail?id=1987
• https://github.com/AcademySoftwareFoundation/openexr/blob/master/CHANGES.md#version-241-february-11-2020
• https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v2.4.1
• https://lists.debian.org/debian-lts-announce/2020/08/msg00056.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4KFGDQG5PVYAU7TS5MZ7XCS6EMPVII3/
• https://security.gentoo.org/glsa/202107-27
• https://support.apple.com/kb/HT211288
• https://support.apple.com/kb/HT211289
• https://support.apple.com/kb/HT211290
• https://support.apple.com/kb/HT211291
• https://support.apple.com/kb/HT211293
• https://support.apple.com/kb/HT211294
• https://support.apple.com/kb/HT211295
• https://usn.ubuntu.com/4339-1/
• https://www.debian.org/security/2020/dsa-4755

Affected products (38)

• cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*
• cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*
• cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:-:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2018-002:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2018-003:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-001:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-002:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-003:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-004:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-005:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-006:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-007:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2020-001:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2020-002:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2020-003:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-001:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:*
• cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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• CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
• CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
• CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
• CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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