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CVE-2024-26130— cryptography NULL pointer deference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override

Quick assessment

Affected
pyca cryptography
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.

python-cryptography是Cryptographic团队的一个应用于加密的 Python 代码库。 python-cryptography 38.0.0版本至42.0.4之前版本存在安全漏洞，该漏洞源于NULL指针取消引用，从而导致Python进程崩溃。

CVSS 7.5 · High EPSS 0.83% · P58

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-26130

Vulnerability Information
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Vulnerability Title
cryptography NULL pointer deference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override
Source: CVE Program / CVE List V5
Vulnerability Description
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
python-cryptography 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
python-cryptography是Cryptographic团队的一个应用于加密的 Python 代码库。 python-cryptography 38.0.0版本至42.0.4之前版本存在安全漏洞，该漏洞源于NULL指针取消引用，从而导致Python进程崩溃。
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
pyca cryptography >= 38.0.0, < 42.0.4 -

II. Public POCs for CVE-2024-26130

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10216 chars
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III. Intelligence Information for CVE-2024-26130

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Patches & Fixes for CVE-2024-26130 (2)

Vendor Advisories for CVE-2024-26130 (1)

IV. Related Vulnerabilities

Same product: cryptography
Same vendor: pyca
Same weakness: CWE-476