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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-47180

CVE-2026-47180: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-47180] Denial of Service via crafted mDNS packets

    CVE-2026-47180Source published Source updated

    Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.5, DNSIncoming._decode_labels_at_offset recurses once per DNS-name compression pointer, and a single mDNS packet carrying chained pointers can trigger a RecursionError that escapes DNSIncoming.__init__, causing sustained CPU burn, log flooding, and degraded mDNS-dependent features for unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb). This issue is fixed in version 0.149.5. This can trigger a recursion error, leading to sustained CPU usage, excessive logging, and degraded mDNS services, ultimately causing a Denial of Service. Exploitation requires the attacker to be on the same local link as the affected host, consistent with Red Hat's Adjacent (AV:A) attack vector…

    Affected products in this advisory
    • Red Hat OpenShift Container Platform 4
    • Red Hat OpenStack Platform 16.2
    • Red Hat OpenStack Platform 17.1
    • Red Hat OpenStack Platform 18.0
    Source-reported affected versions
    • < 0.149.5
    • < 224.0.0.251
    Source-reported fixed versions
    • 0.149.5
    Mitigation guidance
    • Upgrade to zeroconf 0.149.5 or later once packaged in the affected Red Hat product. Where upgrading isn't immediately possible, restricting the affected host's exposure to the local network segment (network segmentation or firewalling multicast DNS traffic on UDP/5353) reduces the practical attack surface, since exploitation requires local-link access.
    Full advisory and evidenceOpen source bulletin

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