CVE-2020-15306

Application crash via trusted chunkCount attribute

Published Jun 26, 2020 · Updated Aug 4, 2024

Heap buffer overflow in OpenEXR before 2.5.2 allows local users to crash an application by supplying an EXR file with an invalid chunkCount. getChunkOffsetTableSize() trusts that header value for supported image types instead of deriving the offset-table size from the image layout, allowing later table processing to write beyond the allocation. Exploitation requires local access to make an application process the crafted file; published impact is limited to a crash, with no confidentiality or integrity effect.

CVSS severity5.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in OpenEXR before 2.5.2 allows local users to crash an application by supplying an EXR file with an invalid chunkCount. getChunkOffsetTableSize() trusts that header value for supported image types instead of deriving the offset-table size from the image layout, allowing later table processing to write beyond the allocation. Exploitation requires local access to make an application process the crafted file; published impact is limited to a crash, with no confidentiality or integrity effect.

The record

CVE
CVE-2020-15306
Published
Jun 26, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1NIST NVDAV:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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