What is CVE-2025-47917?

CVE-2025-47917 is a high-severity vulnerability in Mbed Mbedtls, classified under Use After Free. CVSS score: 8.9/10. Published 2025-07-20.

How severe is CVE-2025-47917?

High severity. CVSS v3 base score is 8.9 out of 10.

Is CVE-2025-47917 known to be exploited?

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

Use After Free in Mbed Mbedtls

CVE-2025-47917

Mbed TLS before 3.6.4 allows a use-after-free in certain situations of applications that are developed in accordance with the documentation. The function mbedtls_x509_string_to_names() takes a head argument that is documented as an output…

Vulnerability class: Use-After-Free

EPSS: 0.084 (92.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H.

Affected products

Mbed Mbedtls — versions 0

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-47917?: CVE-2025-47917 is a high-severity vulnerability in Mbed Mbedtls, classified under Use After Free. CVSS score: 8.9/10. Published 2025-07-20.
How severe is CVE-2025-47917?: High severity. CVSS v3 base score is 8.9 out of 10.
Is CVE-2025-47917 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.