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Fencer Vulns
medium 5.5

CVE-2020-11761 json

An issue was discovered in OpenEXR before 2.4.1.

published 2020-04-14 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4103

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • openexr openexr 2.4.1
  • apple icloud 7.20, 11.3
  • apple itunes 12.10.8
  • apple ipados 13.6
  • apple iphone_os 13.6
  • apple mac_os_x 10.13.6, 10.14.6, 10.15.6
  • apple tvos 13.4.8
  • apple watchos 6.2.8
  • openexr Debian 14, Debian 13, Debian 12 2.5.3-2

debian advisories DEBIAN-CVE-2020-11761

  • openexr Ubuntu 16.04 LTS 2.2.0-10ubuntu2.2
  • openexr Ubuntu 18.04 LTS 2.2.0-11.1ubuntu1.2
  • openexr Ubuntu 20.04 LTS 2.3.0-6ubuntu0.1

ubuntu advisories UBUNTU-CVE-2020-11761

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • OpenEXR RHEL 7 1.7.1-8.el7
  • OpenEXR-libs RHEL 7 1.7.1-8.el7

red hat advisories RHSA-2020:4039

  • openexr SLE Module for Desktop Applications 15 SP1 2.2.1-3.14.1

suse advisories SUSE-SU-2020:1293-1

  • openexr openSUSE Leap 15.1 2.2.1-lp151.4.9.1

opensuse advisories openSUSE-SU-2020:0682-1

  • openexr Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 2.4.1-r0

alpine advisories ALPINE-CVE-2020-11761

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-11761 updated cvss 5.5

OpenEXR: out-of-bounds read during Huffman uncompression

  • Red Hat Enterprise Linux 6 OpenEXR, OpenEXR-libs
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 OpenEXR, OpenEXR-libs, mingw-OpenEXR, mingw32-OpenEXR, mingw64-OpenEXR
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) OpenEXR 1.7.1-8.el7, OpenEXR-libs 1.7.1-8.el7 Red Hat Enterprise Linux Client Optional (v. 7) OpenEXR 1.7.1-8.el7 Red Hat Enterprise Linux ComputeNode (v. 7) OpenEXR 1.7.1-8.el7, OpenEXR-libs 1.7.1-8.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) OpenEXR 1.7.1-8.el7 Red Hat Enterprise Linux Server (v. 7) OpenEXR 1.7.1-8.el7, OpenEXR-libs 1.7.1-8.el7 Red Hat Enterprise Linux Server Optional (v. 7) OpenEXR 1.7.1-8.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) OpenEXR 1.7.1-8.el7, OpenEXR-libs 1.7.1-8.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) OpenEXR 1.7.1-8.el7
    fixed: vendor fix RHSA-2020:4039

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.chromium.org https://bugs.chromium.org/p/project-zero/issues/detail?id=1987 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.