According to the versions of the dnsmasq packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to     cause a denial of service via a crafted DNS packet.(CVE-2026-4890)

    A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local     attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.(CVE-2026-4892)

    A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers     to cause a denial of service via a crafted DNS packet.(CVE-2026-4891)

    An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a     crafted DNS packet with RFC 7871 client subnet information.(CVE-2026-4893)

    dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to     inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP     address, or to cause a DoS.(CVE-2026-2291)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization dnsmasq 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 AOS installed on the remote host is prior to 7.6. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-7.6 advisory.

  - NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator     that enables denial of service and possible remote code execution as a result of deep copying a data     structure and erroneously overwriting a destination pointer. An adversary can exploit the vulnerability by     controlling a malicious signed zone and querying a vulnerable Unbound. When DS sub-queries need to suspend     validation due to NSEC3 computational budget exhaustion (introduced in Unbound 1.19.1), Unbound deep-     copies response messages to preserve them across memory region teardown. A struct-assignment bug     overwrites the destination's pointer with the source's pointer. After the sub-query region is freed, the     resumed validator dereferences this dangling pointer, triggering a crash or potentially enabling arbitrary     code execution. Unbound 1.25.1 contains a patch with a fix to preserve the correct pointer when deep     copying the data structure. (CVE-2026-33278)

  - A vulnerability has been found in GNU Binutils 2.45. The affected element is the function elf_swap_shdr in     the library bfd/elfcode.h of the component Linker. The manipulation leads to heap-based buffer overflow.
    The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The     identifier of the patch is 9ca499644a21ceb3f946d1c179c38a83be084490. To fix this issue, it is recommended     to deploy a patch. The code maintainer replied with [f]ixed for 2.46. (CVE-2025-11083)

  - A heap-based buffer overflow problem was found in glib through an incorrect calculation of buffer size in     the g_escape_uri_string() function. If the string to escape contains a very large number of unacceptable     characters (which would need escaping), the calculation of the length of the escaped string could     overflow, leading to a potential write off the end of the newly allocated string. (CVE-2025-13601)

  - A flaw was found in grub2. The calculation of the translation buffer when reading a language .mo file in     grub_gettext_getstr_from_position() may overflow, leading to a Out-of-bound write. This issue can be     leveraged by an attacker to overwrite grub2's sensitive heap data, eventually leading to the circumvention     of secure boot protections. (CVE-2024-45777)

  - In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a     privilege drop before running the mailer, is not a fatal error and can lead to privilege escalation.
    (CVE-2026-35535)

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 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:1827-1 advisory.

    This update for dnsmasq fixes the following issue:

    - CVE-2026-2291: VU#471747: dnsmasq can be abused to record false cached data enabling DoS or attacker     redirect       (bsc#1258251).

Tenable has extracted the preceding description block directly from the SUSE 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 multiple vulnerabilities as referenced in the RHSA-2026:19158 advisory.

    The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic     Host Configuration Protocol) server.

    Security Fix(es):

    * dnsmasq: dnsmasq: heap buffer overflow in cache via NAME_ESCAPE expansion (CVE-2026-2291)

    * dnsmasq: NSEC bitmap parsing infinite loop (CVE-2026-4890)

    * dnsmasq: RRSIG rdlen underflow leading to heap OOB read (CVE-2026-4891)

    * dnsmasq: DHCPv6 CLID buffer overflow in helper process (CVE-2026-4892)

    * dnsmasq: Broken ECS source validation bypass (CVE-2026-4893)

    * dnsmasq: extract_addresses() OOB read via malformed rdlen (CVE-2026-5172)

    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 these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-19158 advisory.

    - Prevent overflow in extract_name function (CVE-2026-2291)
    - Prevent DoS in DNSSEC validation (CVE-2026-4890)
    - Prevent out-of-bounds read in DNSSEC validation (CVE-2026-4891)
    - Prevent out-of-bounds write in DHCPv6 server (CVE-2026-4892)
    - Prevent source check avoidance by RFC 7871 client-subnet (CVE-2026-4893)
    - Prevent out-of-bounds read in extract_addresses (CVE-2026-5172)

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

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

An update of the dnsmasq package has been released.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1516 advisory.

    dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to     inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP     address, or to cause a DoS. (CVE-2026-2291)

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

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

ID	Name	Product	Family	Published	Updated	Severity
339296	EulerOS Virtualization 2.13.1 : dnsmasq (EulerOS-SA-2026-3170)	Nessus	Huawei Local Security Checks	8/25/2026	8/25/2026	high
328839	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-7.6)	Nessus	Misc.	7/21/2026	9/17/2026	critical
315050	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : dnsmasq (SUSE-SU-2026:1827-1)	Nessus	SuSE Local Security Checks	5/16/2026	5/16/2026	high
315378	RHEL 10 : dnsmasq (RHSA-2026:19158)	Nessus	Red Hat Local Security Checks	5/19/2026	5/28/2026	high
327498	Oracle Linux 10 : dnsmasq (ELSA-2026-19158)	Nessus	Oracle Linux Local Security Checks	7/17/2026	7/17/2026	high
319598	Photon OS 5.0: Dnsmasq PHSA-2026-5.0-0866	Nessus	PhotonOS Local Security Checks	6/6/2026	8/10/2026	high
315629	Amazon Linux 2023 : dnsmasq, dnsmasq-utils (ALAS2023-2026-1516)	Nessus	Amazon Linux Local Security Checks	5/20/2026	6/11/2026	high

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