What is CVE-2025-11618?

CVE-2025-11618 is a medium-severity vulnerability in Aws Freertos-plus-tcp, classified under NULL Pointer Dereference. CVSS score: 4.3/10. Published 2025-10-10.

How severe is CVE-2025-11618?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2025-11618 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Aws Freertos-plus-tcp

CVE-2025-11618

A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP version field in the packet header. This issue only affects…

EPSS: 0.000 (15.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Aws Freertos-plus-tcp — versions 4.0.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.4 (patch, product)
aws.amazon.com/security/security-bulletins/AWS-2025-023/ (vendor-advisory)
github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-6fh9-mqxj-hmwj (third-party-advisory)

Frequently asked questions

What is CVE-2025-11618?: CVE-2025-11618 is a medium-severity vulnerability in Aws Freertos-plus-tcp, classified under NULL Pointer Dereference. CVSS score: 4.3/10. Published 2025-10-10.
How severe is CVE-2025-11618?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2025-11618 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.