The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21533-1 advisory.

    Update to 1.9.15.

    Changes for dnsdist:

    - https://www.dnsdist.org/changelog.html#change-1.9.15
    - https://www.dnsdist.org/changelog.html#change-1.9.14

    Security issues fixed:

    - CVE-2026-40011: invalid output produced in the prometheus endpoint when a large number of crafted DNS     queries are sent       (bsc#1269204).
    - CVE-2026-40208: processing of DoH3 queries can be delayed via DoH3 GET queries with an invalid DATA     frames       (bsc#1269207).
    - CVE-2026-40209: outgoing TCP connections to backend can get stuck until a timeout occurs when specially     crafted IXFR       queries are sent (bsc#1269206).
    - CVE-2026-40210: out-of-bounds read when `SetMacAddrAction` is used can lead to uninitialized memory     being sent over       the network or a crash (bsc#1269205).
    - CVE-2026-40211: crafted DNS over HTTP/3 queries can trigger an exception that prevents memory from being     freed and can       lead to an OOM condition (bsc#1269203).
    - CVE-2026-42004: crafted EDNS OPT record will be ignored by filtering rules, but will be rewritten as a     valid OPT       record when EDNS Client Subnet is inserted (bsc#1269202).
    - CVE-2026-42005: crafted web request can cause unlimited memory allocation in the internal web server and     lead to a DoS       (bsc#1269201).

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.

Detections

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openSUSE 16 Security Update : dnsdist (openSUSE-SU-2026:21533-1)

medium Nessus Plugin ID 333269

Version 1.2