An attacker might be able to trigger an out-of-bounds read by sending a crafted DNS response packet, when custom Lua code uses newDNSPacketOverlay to parse DNS packets. The out-of-bounds read might trigger a crash, leading to a denial of service, or access unrelated memory, leading to potential information disclosure.

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 Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-519446405a advisory.

    Update to latest upstream

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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1618-1 advisory.

    Update to version 1.9.12.

    - https://www.dnsdist.org/changelog.html#change-1.9.12

    Security issues fixed:

    - CVE-2026-0396: crafted DNS queries triggering domain-based dynamic rules can lead to HTML injection in     the web       dashboard (bsc#1261236).
    - CVE-2026-0397: misconfiguration of the CORS policy can lead to information disclosure (bsc#1261237).
    - CVE-2026-24028: crafted DNS packet parsed by Lua code using `newDNSPacketOverlay` can lead to an out-of-     bounds read       (bsc#1261238).
    - CVE-2026-24029: disabled option on a DNS over HTTPS nghttp2 frontend allows clients to bypass ACLs and     send DoH       queries (bsc#1261239).
    - CVE-2026-24030: crafted DoQ and DoH3 queries can lead to unbounded memory allocation and DoS     (bsc#1261240).
    - CVE-2026-27853: crafted DNS responses sent to a DNSdist using certain methods in custom Lua code     (`changeName`) can       lead to an out-of-bounds write (bsc#1261243).
    - CVE-2026-27854: crafted DNS queries sent to a DNSdist using the `DNSQuestion:getEDNSOptions` method in     custom Lua       code can lead to a use-after-free (bsc#1261241).

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 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-637c11815f advisory.

    Update to latest upstream

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-2026-6cae4711b3 advisory.

    Update to latest upstream

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 version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 431c2753-3503-11f1-bc6d-3c7c3fba4204 advisory.

    https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html reports:

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.

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

  - An attacker might be able to trigger an out-of-bounds read by sending a crafted DNS response packet, when     custom Lua code uses newDNSPacketOverlay to parse DNS packets. The out-of-bounds read might trigger a     crash, leading to a denial of service, or access unrelated memory, leading to potential information     disclosure. (CVE-2026-24028)

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

ID	Name	Product	Family	Severity
310797	Debian dsa-6235 : dnsdist - security update	Nessus	Debian Local Security Checks	critical
310697	Fedora 44 : dnsdist (2026-519446405a)	Nessus	Fedora Local Security Checks	high
310228	SUSE SLED15 / SLES15 Security Update : dnsdist (SUSE-SU-2026:1618-1)	Nessus	SuSE Local Security Checks	high
307046	Fedora 42 : dnsdist (2026-637c11815f)	Nessus	Fedora Local Security Checks	high
307044	Fedora 43 : dnsdist (2026-6cae4711b3)	Nessus	Fedora Local Security Checks	high
305995	FreeBSD : DNSdist -- vulnerabilities (431c2753-3503-11f1-bc6d-3c7c3fba4204)	Nessus	FreeBSD Local Security Checks	high
304470	Linux Distros Unpatched Vulnerability : CVE-2026-24028	Nessus	Misc.	high

Detections

Analytics

CVE-2026-24028

high

Tenable Plugins

critical

high

high

high

high

high

high