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Fencer Vulns
medium 6.1

CVE-2021-20303 json

A flaw found in function dataWindowForTile() of IlmImf/ImfTiledMisc.cpp.

published 2022-03-04 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7728

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

A flaw found in function dataWindowForTile() of IlmImf/ImfTiledMisc.cpp. An attacker who is able to submit a crafted file to be processed by OpenEXR could trigger an integer overflow, leading to an out-of-bounds write on the heap. The greatest impact of this flaw is to application availability, with some potential impact to data integrity as well.

Patch / fix

  • openexr openexr 2.5.4
  • openexr Debian 14, Debian 13, Debian 12 2.5.4-1

debian advisories DEBIAN-CVE-2021-20303

  • OpenEXR SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 1.6.1-83.17.30.1
  • openexr SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +12 more 2.1.0-6.37.1
  • openexr SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +12 more 2.2.1-3.35.1

suse advisories SUSE-SU-2021:14846-1SUSE-SU-2021:2913-1SUSE-SU-2021:2793-1

  • openexr openSUSE Leap 15.2 2.2.1-lp152.7.20.1
  • openexr openSUSE Leap 15.3 2.2.1-3.35.1

opensuse advisories openSUSE-SU-2021:1198-1openSUSE-SU-2021:2793-1

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-2021-20303 updated cvss 6.1

OpenEXR: Heap-buffer-overflow in Imf_2_5::copyIntoFrameBuffer

  • Red Hat Enterprise Linux 6 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 7 OpenEXR, OpenEXR-libs
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 OpenEXR, OpenEXR-libs
    affected: no fix planned “Will not fix”

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

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P

Affected products

  • n/a OpenEXR

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.