CVE-2021-26260

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-08 · updated 2026-06-17
Weakness: CWE-400

Description

An integer overflow leading to a heap-buffer overflow was found in the DwaCompressor of OpenEXR in versions before 3.0.1. An attacker could use this flaw to crash an application compiled with OpenEXR. This is a different flaw from CVE-2021-23215.

Affected products

Debian Linux: 9.0, 10.0, 11.0
Fedoraproject Fedora: 33
AcademySoftwareFoundation openexr: before 3.0.1 — fixed in 3.0.1

How to fix

Upgrade to a fixed version: AcademySoftwareFoundation openexr 3.0.1. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1947582
https://lists.debian.org/debian-lts-announce/2021/07/msg00001.html
https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BXFLD4ZAXKAIWO6ZPBCQEEDZB5IG676K/
https://www.debian.org/security/2022/dsa-5299
https://bugzilla.redhat.com/show_bug.cgi?id=1947582
https://lists.debian.org/debian-lts-announce/2021/07/msg00001.html
https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BXFLD4ZAXKAIWO6ZPBCQEEDZB5IG676K/
https://www.debian.org/security/2022/dsa-5299

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