Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to the same domain (e.g., "h.local" as a CNAME for "h.local"). This causes unbounded recursion in the lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.

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

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single     D-Bus method call with conflicting publish flags. This issue has been patched in version     0.9-rc4.(CVE-2026-34933)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., 'h.local' as a CNAME for 'h.local'). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.(CVE-2026-24401)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization avahi security advisory.

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

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

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single     D-Bus method call with conflicting publish flags. This issue has been patched in version     0.9-rc4.(CVE-2026-34933)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., 'h.local' as a CNAME for 'h.local'). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.(CVE-2026-24401)

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

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

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

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., 'h.local' as a CNAME for 'h.local'). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.(CVE-2026-24401)

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

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

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

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In 0.9-rc2 and earlier, an unprivileged local users can crash avahi-daemon (with wide-area     disabled) by creating record browsers with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus. This can be     done by either calling the RecordBrowserNew method directly or creating hostname/address/service     resolvers/browsers that create those browsers internally themselves.(CVE-2025-68276)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending unsolicited announcements containing     CNAME resource records pointing it to resource records with short TTLs. As soon as they expire avahi-     daemon crashes.(CVE-2025-68468)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending 2 unsolicited announcements with     CNAME resource records 2 seconds apart.(CVE-2025-68471)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., 'h.local' as a CNAME for 'h.local'). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.(CVE-2026-24401)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization avahi security advisory.

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

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

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., 'h.local' as a CNAME for 'h.local'). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.(CVE-2026-24401)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In 0.9-rc2 and earlier, an unprivileged local users can crash avahi-daemon (with wide-area     disabled) by creating record browsers with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus. This can be     done by either calling the RecordBrowserNew method directly or creating hostname/address/service     resolvers/browsers that create those browsers internally themselves.(CVE-2025-68276)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending unsolicited announcements containing     CNAME resource records pointing it to resource records with short TTLs. As soon as they expire avahi-     daemon crashes.(CVE-2025-68468)

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending 2 unsolicited announcements with     CNAME resource records 2 seconds apart.(CVE-2025-68471)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization avahi 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 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:1441-1 advisory.

    This update for avahi fixes the following issue:

    - CVE-2026-24401: avahi-daemon can be crashed via a segmentation fault by sending an unsolicited mDNS     response       containing a recursive CNAME record (bsc#1257235).

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 SUSE Linux SLES12 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2026:1442-1 advisory.

    This update for avahi fixes the following issue:

    - CVE-2026-24401: avahi-daemon can be crashed via a segmentation fault by sending an unsolicited mDNS     response       containing a recursive CNAME record (bsc#1257235).

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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006163 advisory.

    Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., h.local as a CNAME for h.local). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.

Tenable has extracted the preceding description block directly from the Unity 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol     suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an     unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to     the same domain (e.g., h.local as a CNAME for h.local). This causes unbounded recursion in the     lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where     AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by     nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524. (CVE-2026-24401)

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

ID	Name	Product	Family	Severity
320713	EulerOS Virtualization 2.13.0 : avahi (EulerOS-SA-2026-2394)	Nessus	Huawei Local Security Checks	medium
320696	EulerOS Virtualization 2.13.1 : avahi (EulerOS-SA-2026-2365)	Nessus	Huawei Local Security Checks	medium
320283	EulerOS 2.0 SP13 : avahi (EulerOS-SA-2026-2278)	Nessus	Huawei Local Security Checks	medium
320233	EulerOS 2.0 SP13 : avahi (EulerOS-SA-2026-2321)	Nessus	Huawei Local Security Checks	medium
319976	EulerOS 2.0 SP11 : avahi (EulerOS-SA-2026-2197)	Nessus	Huawei Local Security Checks	medium
319960	EulerOS 2.0 SP11 : avahi (EulerOS-SA-2026-2235)	Nessus	Huawei Local Security Checks	medium
319486	EulerOS Virtualization 2.10.1 : avahi (EulerOS-SA-2026-2015)	Nessus	Huawei Local Security Checks	medium
319391	EulerOS Virtualization 2.10.0 : avahi (EulerOS-SA-2026-2042)	Nessus	Huawei Local Security Checks	medium
319373	EulerOS Virtualization 2.12.1 : avahi (EulerOS-SA-2026-2070)	Nessus	Huawei Local Security Checks	medium
319366	EulerOS Virtualization 2.12.0 : avahi (EulerOS-SA-2026-2095)	Nessus	Huawei Local Security Checks	medium
307429	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : avahi (SUSE-SU-2026:1441-1)	Nessus	SuSE Local Security Checks	medium
307418	SUSE SLES12 Security Update : avahi (SUSE-SU-2026:1442-1)	Nessus	SuSE Local Security Checks	medium
302309	Unity Linux 20.1070e Security Update: avahi (UTSA-2026-006163)	Nessus	Unity Linux Local Security Checks	medium
296504	Linux Distros Unpatched Vulnerability : CVE-2026-24401	Nessus	Misc.	medium

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