What is CVE-2025-48965?

CVE-2025-48965 is a medium-severity vulnerability in Arm Mbed_tls, classified under CWE-696. CVSS score: 4.0/10. Published 2025-07-20.

How severe is CVE-2025-48965?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Is CVE-2025-48965 known to be exploited?

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

NULL pointer dereference in Arm Mbed_tls

CVE-2025-48965

Mbed TLS before 3.6.4 has a NULL pointer dereference because mbedtls_asn1_store_named_data can trigger conflicting data with val.p of NULL but val.len greater than zero.

EPSS: 0.005 (37.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L.

Affected products

Arm Mbed_tls
Mbed Mbedtls — versions 0

Weakness classification (CWE)

Public proof-of-concept exploits

w4zu/Debian_

References

cve@mitre.org (Vendor Advisory)
cve@mitre.org (Third Party Advisory, Mitigation)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2025-48965?: CVE-2025-48965 is a medium-severity vulnerability in Arm Mbed_tls, classified under CWE-696. CVSS score: 4.0/10. Published 2025-07-20.
How severe is CVE-2025-48965?: Medium severity. CVSS v3 base score is 4.0 out of 10.
Is CVE-2025-48965 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.