---
cve: "CVE-2025-5688"
severity: "HIGH"
cvss: 7.5
epss: "0.4%"
vendor: "Amazon"
kev: false
exploited: false
published: "2025-06-04 17:15:29"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-25T18:58:37+02:00"
---

# CVE-2025-5688

> 7.5 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 21c0438b73c7a22f8c7b08d0ff5ac8a5e1e21a97 (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-5688) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_