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CVE-2025-47917

Quick assessment

Affected
Mbed mbedtls
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mbed TLS是Mbed TLS开源的一个开源、可移植、易于使用、可读且灵活的 SSL 库。 Mbed TLS 3.6.4之前版本存在资源管理错误漏洞，该漏洞源于释放后重用，可能导致空指针取消引用或双重释放。

CVSS 8.9 · High EPSS 2.15% · P82

Public Exploits 1

ExploitDB · 1 EDB-52427 [local]

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-47917

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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 argument. The documentation does not suggest that the function will free that pointer; however, the function does call mbedtls_asn1_free_named_data_list() on that argument, which performs a deep free(). As a result, application code that uses this function (relying only on documented behavior) is likely to still hold pointers to the memory blocks that were freed, resulting in a high risk of use-after-free or double-free. In particular, the two sample programs x509/cert_write and x509/cert_req are affected (use-after-free if the san string contains more than one DN).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Mbed TLS 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mbed TLS是Mbed TLS开源的一个开源、可移植、易于使用、可读且灵活的 SSL 库。 Mbed TLS 3.6.4之前版本存在资源管理错误漏洞，该漏洞源于释放后重用，可能导致空指针取消引用或双重释放。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mbed mbedtls 0 ~ 3.6.4 -

II. Public POCs for CVE-2025-47917

# POC Description Source Link Shenlong Link
1 PoC exploit for CVE-2025-47917: Use-After-Free in mbedTLS leading to remote code execution. https://github.com/byteReaper77/CVE-2025-47917 POC Details
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8512 chars
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III. Intelligence Information for CVE-2025-47917

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Same Patch Batch · Mbed · 2025-07-20 · 3 CVEs total

CVE-2025-48965 4.0 MEDIUM Mbed TLS 安全漏洞
CVE-2025-49087 4.0 MEDIUM Mbed TLS 安全漏洞

IV. Related Vulnerabilities

Same product: mbedtls
Same vendor: Mbed
Same weakness: CWE-416

V. Comments for CVE-2025-47917

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