CVE-2026-59985Public exploitHinoki check available

ILP32 decoder crash via truncated RLE allocation

Published Aug 25, 2026 · Updated Aug 25, 2026

Heap out-of-bounds read in OpenEXR allows attackers to crash ILP32 decoders via a crafted RLE-compressed EXR file. OpenEXRCore truncates the 64-bit unpacked size to an eight-byte size_t allocation, then unpack_32bit reads across the declared channel width. Only affected 3.2, 3.3, and 3.4 releases built for 32-bit ILP32 are exposed; LP64 builds are not demonstrated, and the proven consequence is a process crash.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap out-of-bounds read in OpenEXR allows attackers to crash ILP32 decoders via a crafted RLE-compressed EXR file. OpenEXRCore truncates the 64-bit unpacked size to an eight-byte size_t allocation, then unpack_32bit reads across the declared channel width. Only affected 3.2, 3.3, and 3.4 releases built for 32-bit ILP32 are exposed; LP64 builds are not demonstrated, and the proven consequence is a process crash.

The record

CVE
CVE-2026-59985
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-125, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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=>= 3.2.0, < 3.2.11
  2. Affected versionversion=>= 3.3.0, < 3.3.13
  3. Affected versionversion=>= 3.4.0, < 3.4.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=>= 3.2.0, < 3.2.11; version=>= 3.3.0, < 3.3.13; version=>= 3.4.0, < 3.4.14

Published CVSS scores

5.5GitHub Security AdvisoryCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution
T1204.002Malicious File

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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