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OpenEXR CVE-2026-54920

| EUVDEUVD-2026-65182 NONE
Integer Overflow or Wraparound (CWE-190)
2026-08-25 GitHub_M
Denial Of Service Integer Overflow Openexr Suse Academysoftwarefoundation

Severity by source

Vendor (GitHub_M) PRIMARY
0.0 NONE
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
vuln.today AI
7.5 HIGH

Network-delivered crafted file requires no privileges or interaction; sole impact is total process availability loss via unconditional abort().

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Aug 25, 2026 - 02:01 EUVD
Analysis Generated
Aug 25, 2026 - 00:44 vuln.today

DescriptionCVE.org

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.12, a reachable assertion failure in the HTJ2K decode path allows a crafted HTJ2K-compressed EXR file to cause an unconditional process abort in any application that calls exr_start_read() on untrusted input, resulting in denial of service. The crash is triggered by a QCD marker whose lower five bits are zero, which OpenEXR passes into the vendored OpenJPH library while constructing the codestream and evaluating its quantization delta parameters. OpenJPH uses an assertion rather than a recoverable error to validate those bits, so any invalid value calls abort() directly and cannot be intercepted by surrounding error handling, a problem compounded by OpenEXR wrapping only its internal HT header parser in error handling while leaving the later codestream read and construction calls unprotected. This issue has been resolved in version 3.4.13.

AnalysisAI

Denial of service in OpenEXR 3.4.0 through 3.4.12 allows any application calling exr_start_read() on untrusted input to be unconditionally aborted by a crafted HTJ2K-compressed EXR file containing a QCD marker with lower five bits set to zero. The flaw chains two weaknesses: OpenJPH's vendored assertion-based validation calls abort() instead of returning a recoverable error, and OpenEXR's error handling wraps only its internal HT header parser, leaving downstream codestream construction calls entirely unprotected. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation The vulnerable code path activates only when an EXR file uses HTJ2K (High Throughput JPEG 2000) compression and contains a QCD marker segment whose lower five bits are all zero - an invalid but syntactically legal value that OpenEXR passes into OpenJPH without validation. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N) scores zero availability impact despite the vulnerability being a confirmed unconditional process abort; it appears to be a data-entry placeholder and should not be relied upon for prioritization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: OpenEXR 3.4.13 resolves this issue per GitHub Security Advisory GHSA-fp75-87pr-8329 (https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fp75-87pr-8329). … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-190 – Integer Overflow or Wraparound

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Desktop Applications 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0 Fixed
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed
openSUSE Leap 16.0 Fixed
openSUSE Tumbleweed Fixed

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CVE-2026-54920 vulnerability details – vuln.today
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