Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-52a9a687f0 advisory.

    Update to 1.28.0

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-2026-29f4f47ade advisory.

    Update to 1.28.0

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-d619d8d077 advisory.

    Automatic update for micropython-1.28.0-1.fc45.

    ##### **Changelog**

    ```
    * Mon Apr  6 2026 Lumr Balhar <lbalhar@redhat.com> - 1.28.0-1
    - Update to 1.28.0
    - Security fix for CVE-2026-1998
    - Update mbedtls submodule to 3.6.6
    - mbedtls security fixes for CVE-2026-25834, CVE-2026-34871, CVE-2026-25833
    - CVE-2025-52496, CVE-2025-52497, CVE-2025-49087, CVE-2025-54764, CVE-2025-59438      Resolves: rhbz#2455368, rhbz#2376688, rhbz#2376701, rhbz#2382261, rhbz#2405245,      rhbz#2405374, rhbz#2437327, rhbz#2454032, rhbz#2454086, rhbz#2454213

    ```

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.

  - Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to     mbedtls_mpi_mod_inv or mbedtls_mpi_gcd. (CVE-2025-54764)

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-dce2ac8ea0 advisory.

    - Update to 3.6.5

    Release notes: https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-3.6.5


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.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to
    mbedtls_mpi_mod_inv or mbedtls_mpi_gcd. (CVE-2025-54764)

  - Mbed TLS through 3.6.4 has an Observable Timing Discrepancy. (CVE-2025-59438)

ID	Name	Product	Family	Severity
310204	Fedora 44 : micropython (2026-52a9a687f0)	Nessus	Fedora Local Security Checks	medium
306614	Fedora 43 : micropython (2026-29f4f47ade)	Nessus	Fedora Local Security Checks	medium
306036	Fedora 45 : micropython (2026-d619d8d077)	Nessus	Fedora Local Security Checks	medium
271658	Linux Distros Unpatched Vulnerability : CVE-2025-54764	Nessus	Misc.	medium
271473	Fedora 43 : mbedtls (2025-dce2ac8ea0)	Nessus	Fedora Local Security Checks	medium
435641	Alpine: multiple mbedtls packages: security update to 3.6.5-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
435641	Alpine: multiple mbedtls packages: security update to 3.6.5-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium

Detections

Analytics

CVE-2025-54764

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium