CVE-2025-5688
HIGHLLMNR/mDNS - Buffer Overflow
Title source: llmDescription
We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled. Users should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.
Exploits (1)
nomisec
WORKING POC
by mbanyamer · poc
https://github.com/mbanyamer/CVE-2025-5688-FreeRTOS-Plus-TCP-Out-of-Bounds-Write
Scores
CVSS v4
7.5
EPSS
0.0011
EPSS Percentile
29.0%
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Details
CWE
CWE-787
Status
published
Products (1)
Amazon/FreeRTOS
2.3.4 - 4.3.2
Published
Jun 04, 2025
Tracked Since
Feb 18, 2026