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

  - An attacker can send a web request that causes unlimited memory allocation in the internal web server,     leading to a denial of service. The internal web server is disabled by default. (CVE-2026-33257)

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

The remote Debian 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6234 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6234-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 28, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : pdns-recursor     CVE ID         : CVE-2026-33257 CVE-2026-33258 CVE-2026-33259                      CVE-2026-33260 CVE-2026-33261 CVE-2026-33600                      CVE-2026-33601

    Multiple vulnerabiliites have been discovered in PDNS Recursor, a     resolving name server, which could result in denial of service.

    For the stable distribution (trixie), these problems have been fixed in     version 5.2.9-0+deb13u1.

    We recommend that you upgrade your pdns-recursor packages.

    For the detailed security status of pdns-recursor please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/pdns-recursor

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 Debian 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6235 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6235-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 28, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : dnsdist     CVE ID         : CVE-2026-0396  CVE-2026-0397  CVE-2026-24028                      CVE-2026-24029 CVE-2026-24030 CVE-2026-27853                      CVE-2026-27854 CVE-2026-33254 CVE-2026-33257                      CVE-2026-33260 CVE-2026-33593 CVE-2026-33594                      CVE-2026-33595 CVE-2026-33596 CVE-2026-33597                      CVE-2026-33598 CVE-2026-33599 CVE-2026-33602

    Multiple security vulnerabilities were discovered in the dnsdist     DNS loadbalancer, which could result in denial of service, information     disclosure or ACL bypass.

    For the stable distribution (trixie), these problems have been fixed in     version 1.9.14-0+deb13u1.

    We recommend that you upgrade your dnsdist packages.

    For the detailed security status of dnsdist please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/dnsdist

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6233 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6233-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 28, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : pdns     CVE ID         : CVE-2026-33257 CVE-2026-33260 CVE-2026-33608                      CVE-2026-33609 CVE-2026-33610 CVE-2026-33611

    Multiple security vulnerabilities were discovered in the dnsdist DNS     loadbalancer, which could result in denial of service, information     disclosure or ACL bypass.

    For the stable distribution (trixie), these problems have been fixed in     version 4.9.14-0+deb13u1.

    We recommend that you upgrade your pdns packages.

    For the detailed security status of pdns please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/pdns

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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	Published	Updated	Severity
309721	Linux Distros Unpatched Vulnerability : CVE-2026-33257	Nessus	Misc.	4/22/2026	5/1/2026	high
310795	Debian dsa-6234 : pdns-recursor - security update	Nessus	Debian Local Security Checks	4/29/2026	4/29/2026	high
310797	Debian dsa-6235 : dnsdist - security update	Nessus	Debian Local Security Checks	4/29/2026	4/29/2026	critical
310796	Debian dsa-6233 : pdns-backend-bind - security update	Nessus	Debian Local Security Checks	4/29/2026	4/29/2026	critical

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