# CVE-2026-64860: espressif/mdns has Uncontrolled Recursion in mDNS Name Decompression

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- espressif / esp-protocols: < 1.11.2 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-400, CWE-674

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/espressif/esp-protocols/security/advisories/GHSA-7fpr-vjw5-2c86 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/espressif/esp-protocols/commit/95c882c7d7d661d28d4685bd052b024154a8402f (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/espressif/esp-protocols/releases/tag/mdns-v1.11.2 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-64860; retrieved 2026-11-05; source updated 2026-11-05

Revision: 8824e11f29cf0bddbcc7a5992e71b8df84cbc8c2ed2433e0d2075cd8ab3ba283

Canonical: https://y2.dev/cve/CVE-2026-64860

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