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CVE-2026-24401 on CTRL-OS 24.05

Packages: avahi

Status: In Progress

CVE Information

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.

Updates

2026-04-08 00:01 CEST

Metadata changes:

  • Status for package avahi: “In Progress”

2026-04-07 23:27 CEST

Metadata changes:

  • Status for package avahi: “Plausible”

2026-04-07 16:52 CEST

Metadata changes:

  • Status for package avahi: “Acknowledged”