Bug 2567672 (CVE-2026-64860) - CVE-2026-64860 mdns: mdns: Denial of Service via uncontrolled recursion in domain name parsing
Summary: CVE-2026-64860 mdns: mdns: Denial of Service via uncontrolled recursion in do...
Keywords:
Status: NEW
Alias: CVE-2026-64860
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:16 UTC by OSIDB Bzimport
Modified: 2026-11-06 00:22 UTC (History)
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Description OSIDB Bzimport 2026-11-05 22:16:59 UTC
ESP-Protocols is a collection of protocol components for ESP-IDF. Prior to mDNS version 1.11.2, the `mdns` component follows DNS name-compression pointers recursively when parsing fully qualified domain names (FQDNs) in inbound mDNS packets without capping pointer-follow depth in `mdns_utils_read_fqdn()`. An unauthenticated attacker on the same link-local network can send a crafted packet to UDP port 5353 on an `ESP-IDF` device using `espressif/mdns` with mDNS enabled. Deep recursion exhausts the fixed-size stack of the mDNS FreeRTOS task, causing a controlled panic and reboot; persistent malicious traffic can cause a crash loop. No confidentiality or integrity impact has been demonstrated, and remote code execution is not claimed. This issue is fixed in mDNS version 1.11.2.


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