Is CVE-2023-49083 actively exploited?

CVE-2023-49083 has no public evidence of in-the-wild exploitation as of 2025-11-03.

What is the CVSS score for CVE-2023-49083?

CVE-2023-49083 has a CVSS score of 5.9 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-49083?

Patch guidance is available from cryptography.io security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-49083.

Which products are affected by CVE-2023-49083?

1 product: cryptography.io cryptography.

CVE-2023-49083 - remediation guidance & executive summary

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-476 · NULL Pointer Dereference

Metadata

Primary Vendor: CRYPTOGRAPHY.IO
Published: 11/29/2023
Last Modified: 11/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2023-49083

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary