CVE-2026-68515Public exploitHinoki check available

Heap overwrite via truncated subsampled channel allocation

Published Aug 25, 2026 · Updated Aug 25, 2026

Heap overwrite in OpenEXR exrmultiview allows attackers to corrupt memory by combining crafted, individually valid scanline EXR files. Sampled channel storage uses truncated union width divided by xSampling, while a Slice indexes from a misaligned union dataWindow and writes beyond the allocation. The attacker must cause a user or automated asset pipeline to combine both files; demonstrated results are an ASan crash or silent heap corruption followed by an exception.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap overwrite in OpenEXR exrmultiview allows attackers to corrupt memory by combining crafted, individually valid scanline EXR files. Sampled channel storage uses truncated union width divided by xSampling, while a Slice indexes from a misaligned union dataWindow and writes beyond the allocation. The attacker must cause a user or automated asset pipeline to combine both files; demonstrated results are an ASan crash or silent heap corruption followed by an exception.

The record

CVE
CVE-2026-68515
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-122, CWE-787, 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=< 3.2.11
  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=< 3.2.11; version=>= 3.3.0, < 3.3.13; version=>= 3.4.0, < 3.4.14

Published CVSS scores

7.1GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1204.002User Execution Malicious 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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