CVE-2025-5688

Out of Bounds Write in FreeRTOS-Plus-TCP

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.

Category

7.5
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.01%
Affected: Amazon FreeRTOS
Published at:
Updated at:

References

Link Tags
https://aws.amazon.com/security/security-bulletins/AWS-2025-012/

Frequently Asked Questions

What is the severity of CVE-2025-5688?
CVE-2025-5688 has been scored as a high severity vulnerability.
How to fix CVE-2025-5688?
To fix CVE-2025-5688, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-5688 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-5688 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-5688?
CVE-2025-5688 affects Amazon FreeRTOS.
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