OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage
    format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while
    fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data
    inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined
    behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
    (CVE-2025-64181)

The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1775211239 advisory.

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27946. (CVE-2025-12495)

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27947. (CVE-2025-12839)

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27948. (CVE-2025-12840)

  - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage     format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while     fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data     inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined     behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
    (CVE-2025-64181)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1775234419 advisory.

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27946. (CVE-2025-12495)

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27947. (CVE-2025-12839)

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27948. (CVE-2025-12840)

  - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage     format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while     fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data     inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined     behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
    (CVE-2025-64181)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1775211239 advisory.

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27946. (CVE-2025-12495)

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27947. (CVE-2025-12839)

  - Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution     Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected     installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this     vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw     exists within the parsing of EXR files. The issue results from the lack of proper validation of the length     of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this     vulnerability to execute code in the context of the current process. Was ZDI-CAN-27948. (CVE-2025-12840)

  - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage     format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while     fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data     inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined     behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
    (CVE-2025-64181)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-0e8fe3c8a3 advisory.

    Update to openexr-3.3.6, fixes multiple security issues.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1fbf91067c advisory.

    Update to openexr-3.3.6, fixes multiple security issues.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-447047dda8 advisory.

    Backport fixes for CVE-2025-64181 etc. in OpenEXRCore

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-4924a5bc8b advisory.

    Backport fixes for CVE-2025-64181 etc. in OpenEXRCore


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2025-20056-1 advisory.

    - CVE-2025-64181: Fixed use of uninitialized memory in function generic_unpack() (bsc#1253233)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage     format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while     fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data     inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined     behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
    (CVE-2025-64181)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
459590	Echo: openexr: security update to 3.1.13-2+e1	Tenable Cloud Security	Echo Local Security Checks	Local	medium
459590	Echo: openexr: security update to 3.1.13-2+e1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
361009	AlmaLinux 9.6 [TuxCare] Security Update: openexr / openexr-devel / openexr-libs Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1775211239)	Nessus	Alma Linux Local Security Checks	Local	medium
361003	AlmaLinux 9.2 [TuxCare] Security Update: openexr / openexr-devel / openexr-libs Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1775234419)	Nessus	Alma Linux Local Security Checks	Local	medium
360948	Rocky Linux 9.6 [TuxCare] Security Update: openexr / openexr-devel / openexr-libs Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1775211239)	Nessus	Rocky Linux Local Security Checks	Local	medium
296580	Fedora 42 : mingw-openexr (2026-0e8fe3c8a3)	Nessus	Fedora Local Security Checks	Local	high
296550	Fedora 43 : mingw-openexr (2026-1fbf91067c)	Nessus	Fedora Local Security Checks	Local	high
278737	Fedora 42 : usd (2025-447047dda8)	Nessus	Fedora Local Security Checks	Local	medium
278729	Fedora 43 : usd (2025-4924a5bc8b)	Nessus	Fedora Local Security Checks	Local	medium
276602	openSUSE 16 Security Update : openexr (openSUSE-SU-2025-20056-1)	Nessus	SuSE Local Security Checks	Local	medium
274729	Linux Distros Unpatched Vulnerability : CVE-2025-64181	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2025-64181

medium

Tenable Plugins

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