CVE-2021-26945

Application crash via deep-tile pointer arithmetic overflow

Published Jun 8, 2021 · Updated Aug 3, 2024

Integer overflow in OpenEXR before 3.0.1 allows local users to crash applications that process a crafted deep-tiled EXR file. In OpenEXRUtil's readDeepTile path, 32-bit calculations for data-window dimensions and frame-buffer offsets can wrap before pointer construction. Reaching the fault requires an application to process an attacker-supplied EXR file; the documented consequence is a crash, not data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.67%
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 local users to crash applications that process a crafted deep-tiled EXR file. In OpenEXRUtil's readDeepTile path, 32-bit calculations for data-window dimensions and frame-buffer offsets can wrap before pointer construction. Reaching the fault requires an application to process an attacker-supplied EXR file; the documented consequence is a crash, not data disclosure or modification.

The record

CVE
CVE-2021-26945
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?

Compare these published version ranges with your installed build and any vendor patches.

  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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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
T1204.002User Execution Malicious 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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