cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3922-1 python-cryptography security update
EUVD EUVD EUVD-2023-0060 cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.
Github GHSA Github GHSA GHSA-jfhm-5ghh-2f97 cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
Ubuntu USN Ubuntu USN USN-6539-1 python-cryptography vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 18 Dec 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 03 Nov 2025 22:30:00 +0000

Type Values Removed Values Added
References

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00445}

epss

{'score': 0.00457}


Thu, 12 Dec 2024 02:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_eus:8.8
Vendors & Products Redhat rhel Eus

Thu, 05 Sep 2024 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Cryptography.io
Cryptography.io cryptography
CPEs cpe:2.3:a:cryptography_project:cryptography:*:*:*:*:*:python:*:* cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*
Vendors & Products Cryptography Project
Cryptography Project cryptography
Cryptography.io
Cryptography.io cryptography

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-18T15:32:14.214Z

Reserved: 2023-11-21T18:57:30.428Z

Link: CVE-2023-49083

cve-icon Vulnrichment

Updated: 2025-11-03T21:50:11.841Z

cve-icon NVD

Status : Modified

Published: 2023-11-29T19:15:07.967

Modified: 2025-11-03T22:16:29.837

Link: CVE-2023-49083

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-11-28T00:00:00Z

Links: CVE-2023-49083 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses