Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error. This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.

oracle_linux ELSA-2026-7342: ELSA-2026-7342:  kea security update (IMPORTANT)

The remote AlmaLinux 10 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:7342 advisory.

    * Kea: Kea: Denial of Service via maliciously crafted message (CVE-2026-3608)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:7342 advisory.

    * Kea: Kea: Denial of Service via maliciously crafted message (CVE-2026-3608)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:7342 advisory.

    DHCP implementation from Internet Systems Consortium, Inc. that features fully functional DHCPv4, DHCPv6     and Dynamic DNS servers. Both DHCP servers fully support server discovery, address assignment, renewal,     rebinding and release. The DHCPv6 server supports prefix delegation. Both servers support DNS Update     mechanism, using stand-alone DDNS daemon.

    Security Fix(es):

    * Kea: Kea: Denial of Service via maliciously crafted message (CVE-2026-3608)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue 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 a vulnerability as referenced in the FEDORA-2026-66f19b11e0 advisory.

    - New version 3.0.3 (rhbz#2451141)
    - Fixes CVE-2026-3608 (rhbz#2451621)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue 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 a vulnerability as referenced in the FEDORA-2026-04263e2a5b advisory.

    - New version 3.0.3 (rhbz#2451141)
    - Fixes CVE-2026-3608 (rhbz#2451621)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20452-1 advisory.

    Update to 3.0.3:

    - CVE-2025-11232: invalid characters cause assert (bsc#1252863).
    - CVE-2026-3608: stack overflow via maliciously crafted message (bsc#1260380).

    Changelog:

     * A large number of bracket pairs in a JSON payload directed to      any endpoint would result in a stack overflow, due to recursive      calls when parsing the JSON. This has been fixed.
     (CVE-2026-3608)      [bsc#1260380]
     * When a hostname or FQDN received from a client is reduced to an      empty string by hostname sanitizing, kea-dhcp4 and kea-dhcp6      will now drop the option.
     (CVE-2025-11232)      [bsc#1252863]
     * A null dereference is now no longer possible when configuring      the Control Agent with a socket that lacks the mandatory      socket-name entry.
     * UNIX sockets are now created as group-writable.
     * Removed logging an error in ping check hook library if using      lease cache treshold.
     * Fixed deadlock in ping-check hooks library.
     * Fixed a data race in ping-check hooks library.

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 45 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-11e168602c advisory.

    Automatic update for kea-3.0.3-1.fc45.

    ##### **Changelog**

    ```
    * Thu Mar 26 2026 Martin Osvald <mosvald@redhat.com> - 3.0.3-1
    - New version 3.0.3 (rhbz#2451141)
    - Fixes CVE-2026-3608 (rhbz#2451621)

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue 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.

  - Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6     daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack     overflow error. This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.
    (CVE-2026-3608)

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

ID	Name	Product	Family	Severity
306518	AlmaLinux 10 : kea (ALSA-2026:7342)	Nessus	Alma Linux Local Security Checks	high
306015	RockyLinux 10 : kea (RLSA-2026:7342)	Nessus	Rocky Linux Local Security Checks	high
305799	RHEL 10 : kea (RHSA-2026:7342)	Nessus	Red Hat Local Security Checks	high
305291	Fedora 42 : kea (2026-66f19b11e0)	Nessus	Fedora Local Security Checks	high
305243	Fedora 43 : kea (2026-04263e2a5b)	Nessus	Fedora Local Security Checks	high
304858	openSUSE 16 Security Update : kea (openSUSE-SU-2026:20452-1)	Nessus	SuSE Local Security Checks	high
304384	Fedora 45 : kea (2026-11e168602c)	Nessus	Fedora Local Security Checks	high
303617	Linux Distros Unpatched Vulnerability : CVE-2026-3608	Nessus	Misc.	high

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