The version of gnutls installed on the remote host is prior to 3.8.12. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-042-01 advisory.

    New gnutls packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the gnutls 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-2026-2b6035ee2b advisory.

    This backports fixes for a couple CVEs:

    ** libgnutls: Fix NULL pointer dereference in PSK binder verification A TLS 1.3 resumption attempt with an     invalid PSK binder value in ClientHello could lead to a denial of service attack via crashing the server.
    The updated code guards against the problematic dereference. Reported by Jaehun Lee. [Fixes: GNUTLS-     SA-2026-02-09-1, CVSS: high] [CVE-2026-1584]

    ** libgnutls: Fix name constraint processing performance issue Verifying certificates with pathological     amounts of name constraints could lead to a denial of service attack via resource exhaustion. Reworked     processing algorithms exhibit better performance characteristics. Reported by Tim Scheckenbach. [Fixes:
    GNUTLS-SA-2026-02-09-2, CVSS: medium] [CVE-2025-14831]

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-ef7170c9f6 advisory.

    This fixes a couple CVEs:

    ** libgnutls: Fix NULL pointer dereference in PSK binder verification A TLS 1.3 resumption attempt with an     invalid PSK binder value in ClientHello could lead to a denial of service attack via crashing the server.
    The updated code guards against the problematic dereference. Reported by Jaehun Lee. [Fixes: GNUTLS-     SA-2026-02-09-1, CVSS: high] [CVE-2026-1584]

    ** libgnutls: Fix name constraint processing performance issue Verifying certificates with pathological     amounts of name constraints could lead to a denial of service attack via resource exhaustion. Reworked     processing algorithms exhibit better performance characteristics. Reported by Tim Scheckenbach. [Fixes:
    GNUTLS-SA-2026-02-09-2, CVSS: medium] [CVE-2025-14831]

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.

  - Ubuntu Linux - [Unknown description] (CVE-2026-1584)

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

ID	Name	Product	Family	Severity
299279	Slackware Linux 15.0 / current gnutls Multiple Vulnerabilities (SSA:2026-042-01)	Nessus	Slackware Local Security Checks	medium
299149	Fedora 42 : gnutls (2026-2b6035ee2b)	Nessus	Fedora Local Security Checks	medium
298695	Fedora 43 : gnutls (2026-ef7170c9f6)	Nessus	Fedora Local Security Checks	medium
298449	Linux Distros Unpatched Vulnerability : CVE-2026-1584	Nessus	Misc.	critical

Detections

Analytics

CVE-2026-1584

high

Tenable Plugins

medium

medium

medium

critical