{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-24401 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-24401 is a medium-severity denial of service vulnerability in avahi, published on 24 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-24401 and fix it if it is affected.\n\nWhat it is: CVE-2026-24401 is a medium-severity denial of service vulnerability in avahi, published on 24 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-24401 in the wild and no public exploit code.\n\nAffected product: avahi. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-24401/ (Markdown: https://insights.sbomify.com/CVE-2026-24401/index.md)","id":"CVE-2026-24401","markdown":"https://insights.sbomify.com/CVE-2026-24401/index.md","name":"CVE-2026-24401","record":{"aliases":["ALPINE-CVE-2026-24401","AZL-75204","AZL-75207","BELL-CVE-2026-24401","CLSA-2026-1773137055","CLSA-2026-1778112033","DEBIAN-CVE-2026-24401","ECHO-e408-9130-b921","GHSA-h4vp-5m8j-f6w3","MINI-9569-j92w-g8hr","OESA-2026-1450","ROOT-OS-DEBIAN-12-CVE-2026-24401","ROOT-OS-DEBIAN-13-CVE-2026-24401","SUSE-SU-2026:1191-1","SUSE-SU-2026:1441-1","SUSE-SU-2026:1442-1","SUSE-SU-2026:21117-1","SUSE-SU-2026:21127-1","openSUSE-SU-2026:10701-1"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Avahi service discovery","requires_auth":"none","summary":"An attacker can crash the Avahi daemon by sending a malicious mDNS response with a recursive CNAME, causing stack exhaustion in specific configurations.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"avahi","vendor":"avahi"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-674","name":"Uncontrolled Recursion"}],"description":"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, which is part of version 0.9-rc3.","ecosystems":["SUSE:Linux Enterprise Micro 5.2","SUSE:Linux Enterprise Module for Basesystem 15 SP7","SUSE:Linux Enterprise Module for Desktop Applications 15 SP7","SUSE:Linux Enterprise Module for Package Hub 15 SP7","SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","SUSE:Linux Micro 6.0","SUSE:Linux Micro 6.1","openSUSE:Leap 15.6","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Avahi has Uncontrolled Recursion in lookup_handle_cname function","id":"CVE-2026-24401","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":13,"n_references":3,"next":{"headline":"GitHub cannot issue a CVE for this Security Advisory because this advisory includes information about more than one vulnerability.","id":"CVE-2026-24402"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Micro 5.2","fixed":["0.7-150100.3.49.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.2","source":"SUSE-SU-2026:1191-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP7","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP7","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP7","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP7","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Package Hub 15 SP7","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","fixed":["0.6.32-32.39.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5","source":"SUSE-SU-2026:1442-1"},{"ecosystem":"SUSE:Linux Micro 6.0","fixed":["0.8-8.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Micro%206.0","source":"SUSE-SU-2026:21127-1"},{"ecosystem":"SUSE:Linux Micro 6.1","fixed":["0.8-slfo.1.1_5.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Micro%206.1","source":"SUSE-SU-2026:21117-1"},{"ecosystem":"openSUSE:Leap 15.6","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/opensuse/avahi\u0026distro=openSUSE%20Leap%2015.6","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"openSUSE:Leap 15.6","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/opensuse/avahi-glib2\u0026distro=openSUSE%20Leap%2015.6","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"openSUSE:Leap 15.6","fixed":["0.8-150600.15.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-qt5","purl":"pkg:rpm/opensuse/avahi-qt5\u0026distro=openSUSE%20Leap%2015.6","source":"SUSE-SU-2026:1441-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.8-44.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/opensuse/avahi\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:10701-1"}],"prev":{"headline":"AssertJ has XML External Entity (XXE) vulnerability when parsing untrusted XML via isXmlEqualTo assertion","id":"CVE-2026-24400"},"products":["avahi"],"published":"2026-01-24","related":[{"cvss_score":9.1,"headline":"Denial of service in n/a","id":"CVE-2017-6519","kev_date_added":null,"published":"2017-05-01"},{"cvss_score":7.8,"headline":"Path traversal in n/a","id":"CVE-2021-26720","kev_date_added":null,"published":"2021-02-17"},{"cvss_score":6.5,"headline":"Avahi has a reachable assertion in lookup_multicast_callback","id":"CVE-2025-68468","kev_date_added":null,"published":"2026-01-12"},{"cvss_score":6.5,"headline":"Avahi has a reachable assertion in lookup_start","id":"CVE-2025-68471","kev_date_added":null,"published":"2026-01-12"},{"cvss_score":6.2,"headline":"Reachable assertion in avahi_dns_packet_append_record","id":"CVE-2023-38469","kev_date_added":null,"published":"2023-11-02"},{"cvss_score":6.2,"headline":"Reachable assertion in avahi_escape_label","id":"CVE-2023-38470","kev_date_added":null,"published":"2023-11-02"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-23","vendors":["avahi"]},"summary":"An attacker can crash the Avahi daemon by sending a malicious mDNS response with a recursive CNAME, causing stack exhaustion in specific configurations.","url":"https://insights.sbomify.com/CVE-2026-24401/"}