CVE-2021-26260

Application crash via DWA buffer-size integer overflow

Published Jun 8, 2021 · Updated Aug 3, 2024

Integer overflow in OpenEXR before 3.0.1 allows attackers to crash applications that process crafted DWA-compressed EXR files. DwaCompressor::initializeBuffers stores its maximum output-buffer calculation in a signed int and casts size terms to int, allowing large values to wrap before heap allocation. Processing the crafted image through a linked application is required; the published impact is an application crash, not code execution.

CVSS severity5.5
Medium
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in OpenEXR before 3.0.1 allows attackers to crash applications that process crafted DWA-compressed EXR files. DwaCompressor::initializeBuffers stores its maximum output-buffer calculation in a signed int and casts size terms to int, allowing large values to wrap before heap allocation. Processing the crafted image through a linked application is required; the published impact is an application crash, not code execution.

The record

CVE
CVE-2021-26260
Published
Jun 8, 2021
Updated
Aug 3, 2024
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-190, CWE-400, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=OpenEXR 3.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=OpenEXR 3.0.1

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-400Uncontrolled Resource Consumption
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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