OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a misaligned memory write vulnerability exists in LossyDctDecoder_execute() in src/lib/OpenEXRCore/internal_dwa_decoder.h:749. When decoding a DWA or DWAB-compressed EXR file containing a FLOAT-type channel, the decoder performs an in-place HALF→FLOAT conversion by casting an unaligned uint8_t * row pointer to float * and writing through it. Because the row buffer may not be 4-byte aligned, this constitutes undefined behavior under the C standard and crashes immediately on architectures that enforce alignment (ARM, RISC-V, etc.). On x86 it is silently tolerated at runtime but remains exploitable via compiler optimizations that assume aligned access. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-502486fc61 advisory.

    Backport several OpenEXRCore security fixes

    - Fixes CVE-2026-34378 / GHSA-v76p-4qvv-vh4g; closes RHBZ#2455493
    - Fixes CVE-2026-34380 / GHSA-q3v8-hw4m-59w5; closes RHBZ#2455534
    - Fixes CVE-2026-34588 / GHSA-588r-cr5c-w6hf; closes RHBZ#2455505
    - Fixes CVE-2026-34589 / GHSA-p8xc-w3q4-h64x; closes RHBZ#2455501
    - Fixes CVE-2026-34379 / GHSA-w88v-vqhq-5p24; closes RHBZ#2455497

    ----

    Backport fix for CVE-2026-34544 in OpenEXRCore

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 openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20605-1 advisory.

    - CVE-2026-34379: misaligned memory write during file decoding can cause a denial of service     (bsc#1261621).
    - CVE-2026-34380: lack of proper check can lead to integer overflow in image decoding (bsc#1261622).
    - CVE-2026-34588: crafted EXR file can lead to out of bound read and write (bsc#1261624).
    - CVE-2026-34589: crafted scanline DWAA file can lead to arbitrary code execution or denial of service     (bsc#1261634).

Tenable has extracted the preceding description block directly from the SUSE 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-cde75a1416 advisory.

    Backport several OpenEXRCore security fixes

    - Fixes CVE-2026-34378 / GHSA-v76p-4qvv-vh4g; closes RHBZ#2455493
    - Fixes CVE-2026-34380 / GHSA-q3v8-hw4m-59w5; closes RHBZ#2455534
    - Fixes CVE-2026-34588 / GHSA-588r-cr5c-w6hf; closes RHBZ#2455505
    - Fixes CVE-2026-34589 / GHSA-p8xc-w3q4-h64x; closes RHBZ#2455501
    - Fixes CVE-2026-34379 / GHSA-w88v-vqhq-5p24; closes RHBZ#2455497

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-c803743b67 advisory.

    Update to openexr-3.3.9.

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 multiple vulnerabilities as referenced in the FEDORA-2026-d939698c2e advisory.

    Update to openexr-3.3.9.

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 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c0f8cde7ad advisory.

    Automatic update for usd-26.03-3.fc45.

    ##### **Changelog**

    ```
    * Wed Apr  8 2026 Benjamin A. Beasley <code@musicinmybrain.net> - 26.03-3
    - Backport several OpenEXRCore security fixes
    - Fixes CVE-2026-34378 / GHSA-v76p-4qvv-vh4g; closes RHBZ#2455493
    - Fixes CVE-2026-34380 / GHSA-q3v8-hw4m-59w5; closes RHBZ#2455534
    - Fixes CVE-2026-34588 / GHSA-588r-cr5c-w6hf; closes RHBZ#2455505
    - Fixes CVE-2026-34589 / GHSA-p8xc-w3q4-h64x; closes RHBZ#2455501
    - Fixes CVE-2026-34379 / GHSA-w88v-vqhq-5p24; closes RHBZ#2455497

    ```

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 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. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a misaligned memory     write vulnerability exists in LossyDctDecoder_execute() in src/lib/OpenEXRCore/internal_dwa_decoder.h:749.
    When decoding a DWA or DWAB-compressed EXR file containing a FLOAT-type channel, the decoder performs an     in-place HALFFLOAT conversion by casting an unaligned uint8_t * row pointer to float * and writing     through it. Because the row buffer may not be 4-byte aligned, this constitutes undefined behavior under     the C standard and crashes immediately on architectures that enforce alignment (ARM, RISC-V, etc.). On x86     it is silently tolerated at runtime but remains exploitable via compiler optimizations that assume aligned     access. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9. (CVE-2026-34379)

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

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the adb096d4-2e72-11f1-acc1-339a1a6999b0 advisory.

    Cary Phillips reports:
    [OpenEXR 3.4.9] addresses the following CVEs:

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

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

ID	Name	Product	Family	Severity
310538	Fedora 44 : usd (2026-502486fc61)	Nessus	Fedora Local Security Checks	high
310089	openSUSE 16 Security Update : openexr (openSUSE-SU-2026:20605-1)	Nessus	SuSE Local Security Checks	high
307408	Fedora 43 : usd (2026-cde75a1416)	Nessus	Fedora Local Security Checks	high
306616	Fedora 43 : mingw-openexr (2026-c803743b67)	Nessus	Fedora Local Security Checks	high
306608	Fedora 42 : mingw-openexr (2026-d939698c2e)	Nessus	Fedora Local Security Checks	high
305305	Fedora 45 : usd (2026-c0f8cde7ad)	Nessus	Fedora Local Security Checks	high
305083	Linux Distros Unpatched Vulnerability : CVE-2026-34379	Nessus	Misc.	high
305001	FreeBSD : openexr -- multiple vulnerabilities (adb096d4-2e72-11f1-acc1-339a1a6999b0)	Nessus	FreeBSD Local Security Checks	high

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CVE-2026-34379

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Tenable Plugins

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