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Fencer Vulns
medium 5.5

CVE-2021-26945 json

An integer overflow leading to a heap-buffer overflow was found in OpenEXR in versions before 3.0.1.

published 2021-06-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13727

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

An integer overflow leading to a heap-buffer overflow was found in OpenEXR in versions before 3.0.1. An attacker could use this flaw to crash an application compiled with OpenEXR.

Patch / fix

  • openexr openexr 3.0.1
  • openexr Debian 14, Debian 13, Debian 12 3.1.5-2

debian advisories DEBIAN-CVE-2021-26945

  • openexr Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 3.1.1-r0

alpine advisories ALPINE-CVE-2021-26945

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-2021-26945 updated cvss 5.5

OpenEXR: Integer-overflow in bool Imf_2_5::readDeepTile<Imf_2_5::DeepTiledInputPart>

  • Red Hat Enterprise Linux 6 OpenEXR, OpenEXR-libs
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 8 OpenEXR, OpenEXR-libs
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 openexr, openexr-libs
    not affected: vulnerable code not present

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

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

Affected products

  • n/a OpenEXR

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • 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.