CVE-2021-3598Public exploit

Application crash via unchecked deep-scanline data size

Published Jul 6, 2021 · Updated Aug 3, 2024

Out-of-bounds read in OpenEXR before 3.0.5 allows attackers to crash linked applications via a crafted EXR file. For uncompressed deep scan lines, LineBufferTask::execute trusts packed data shorter than the expected line size, so CharPtrIO::readChars reads beyond the heap buffer. The file must be processed by a linked application; the confirmed consequence is an application crash, without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in OpenEXR before 3.0.5 allows attackers to crash linked applications via a crafted EXR file. For uncompressed deep scan lines, LineBufferTask::execute trusts packed data shorter than the expected line size, so CharPtrIO::readChars reads beyond the heap buffer. The file must be processed by a linked application; the confirmed consequence is an application crash, without reported data disclosure or modification.

The record

CVE
CVE-2021-3598
Published
Jul 6, 2021
Updated
Aug 3, 2024
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-119, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 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 3.0.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=OpenEXR 3.0.5

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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