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TI-2026-85442 Aliases CVE-2026-64860

Uncontrolled recursion in espressif/mdns enables denial of service

Priority LOW 29CWE-400Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

The espressif/mdns component in ESP-Protocols, a collection of protocol components for ESP-IDF, is affected before version 1.11.2. Its mdns_utils_read_fqdn() function follows DNS name-compression pointers recursively without a depth limit when parsing names in inbound mDNS packets, which is an uncontrolled recursion flaw (CWE-674). An unauthenticated attacker on the same link-local network can send a crafted packet to UDP port 5353 on an ESP-IDF device with mDNS enabled. The deep recursion exhausts the fixed-size stack of the mDNS task, causing a controlled panic and reboot, and persistent traffic can cause a crash loop; no confidentiality or integrity impact has been demonstrated.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00319 25th percentileScored 2026-11-07
Fix Fixed esp-protocols (espressif): 1.11.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espressifesp-protocolsbefore 1.11.21.11.2Patch availableCNA
  • esp-protocols Vendorespressif Affected before 1.11.2 Fixed in 1.11.2 Patch available CNA

Remediation

Update espressif/mdns to version 1.11.2 or later, which fixes this issue. The sources list no fixed version for Red Hat products, which are not affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA esp-protocols (espressif) Fixed in 1.11.2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-64860
  2. 2026-11-05 CISA SSVC decision points changed
  3. 2026-11-05 Priority changed: MEDIUM → LOW
  4. 2026-11-06 Affected versions changed · Red Hat
  5. 2026-11-06 CVSS score added · Red Hat

References

Other 3

  • TI-2026-31061 arduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCE CVSS 3.1CRITICAL 9.8
  • TI-2024-30765 Multiple Poisoned Pipeline Execution (PPE) vulnerabilities CVSS 3.1CRITICAL 10.0
  • TI-2026-30028 Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption CVSS 3.1HIGH 8.8
  • TI-2025-33484 CSRF Vulnerability in Firmware Update Endpoints Allows Remote Code Execution CVSS 4.0HIGH 8.7
  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2025-33011 arduino-esp32 vulnerable to CRLF injection in WebServer.cpp CVSS 4.0HIGH 8.9
See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences