CVE-2021-3475Network attack vector

Application crash via tile-count integer overflow

Published Mar 30, 2021 · Updated Aug 3, 2024

Integer overflow in OpenEXR 2.4.0 through 2.4.2 and 2.5.0 through 2.5.3 allows attackers to crash applications via a crafted EXR file. Imf_2_5::calculateNumTiles performs the level-size and tile-size addition in 32-bit integer arithmetic, allowing large image dimensions to overflow the tile-count calculation. The target application must open attacker-controlled image data, and published impact is limited to service interruption.

CVSS severity5.3
Medium
EPSS probability1.85%
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 2.4.0 through 2.4.2 and 2.5.0 through 2.5.3 allows attackers to crash applications via a crafted EXR file. Imf_2_5::calculateNumTiles performs the level-size and tile-size addition in 32-bit integer arithmetic, allowing large image dimensions to overflow the tile-count calculation. The target application must open attacker-controlled image data, and published impact is limited to service interruption.

The record

CVE
CVE-2021-3475
Published
Mar 30, 2021
Updated
Aug 3, 2024
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-190, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 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 3.0.0-beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=OpenEXR 3.0.0-beta

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

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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