Cyber Resilience

CVE-2025-48965

Memory Safety in Arm Mbed Tls ≤ 3.6.4

Published
20 July 2025
Modified
17 June 2026
Patch / advisory
CVSS Score v3.1 4.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
EPSS Score 0.0046 38th percentile
Risk Priority 34 floored blend · peak EPSS

Summary

CVE-2025-48965 is a medium-severity Incorrect Behavior Order (CWE-696) vulnerability in Arm Mbed Tls. Its CVSS base score is 4.0 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Endpoint Denial of Service (T1499); ranked at the 38th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and RA-5 (Vulnerability Monitoring and Scanning) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

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.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1499 Endpoint Denial of Service Impact
Adversaries may perform Endpoint Denial of Service (DoS) attacks to degrade or block the availability of services to users.
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
T1489 Service Stop Impact
Adversaries may stop or disable services on a system to render those services unavailable to legitimate users.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-59438Same product: Arm Mbed Tls
CVE-2023-52353Same product: Arm Mbed Tls
CVE-2025-54764Same product: Arm Mbed Tls
CVE-2025-52497Same product: Arm Mbed Tls
CVE-2025-47917Same product: Arm Mbed Tls
CVE-2025-52496Same product: Arm Mbed Tls
CVE-2025-66442Same product: Arm Mbed Tls
CVE-2026-34872Same product: Arm Mbed Tls
CVE-2024-9413Same vendor: Arm
CVE-2024-11864Same vendor: Arm

Affected Assets

arm
mbed tls
≤ 3.6.4

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

Developer testing and evaluation at post-design stages can discover incorrect ordering of related behaviors before deployment.

Vulnerability scanning may surface order-related weaknesses after code is built but does not address their root cause.

Mandating a documented development process and standards enforces review of behavior ordering within the software lifecycle.

Security and privacy engineering principles applied during design and implementation directly require correct sequencing of operations to avoid introducing order-dependent flaws.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly enforce correct sequencing of security-relevant operations during design and coding.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing can detect ordering flaws but does not prevent them during development.

prevents

Secure development life cycle mandates correct sequencing of security activities, directly preventing incorrect behavior order.

prevents

Application security requirements can specify input validation and pointer-safety rules.

prevents

Secure system architecture and engineering principles require proper ordering of design and implementation steps.

prevents

Secure coding standards enforce correct execution order of security-critical operations.

none

Change management may catch order-related issues during reviews but does not address root cause.

References