CVE-2025-5688

HIGH EPSS 22.1%
Published Jun 4, 20251y ago · Modified Jun 17, 20261w ago
7.5 CVSS 4.0
High
Find Similar
Published Jun 4, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
22.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

References 3

  • aws.amazon.com https://aws.amazon.com/security/security-bulletins/AWS-2025-012/
  • github.com https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.2
  • github.com https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-5x4f-fvv8-wr65

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.