CVE-2023-49083

24

FAUCET Score

CVE-2023-49083 is a NULL-pointer dereference vulnerability affecting the cryptography Python package, specifically when processing PKCS7 certificates via load_pem_pkcs7_certificates or load_der_pkcs7_certificates. This flaw carries a CVSS score of 7.5 (High) due to its potential for Denial of Service (DoS) attacks, as it can cause applications to crash. The vulnerability is easily exploitable over the network with low attack complexity and no user interaction required. While patches are available in version 41.0.6, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 3.1, < 41.0.6CPE matchmatch criteria	cpe:2.3:a:cryptography.io:cryptography::::::python::*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

2.2

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.98%

Probability of exploitation in next 30 days

EPSS Percentile

58.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0098 is in the 34th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (38)

denopatch availablevia llm_extracted

github_advisorypatch availablevia nvd_reference

keraspatch availablevia llm_extracted

microsoftpatch availablevia msrc

Product: Azure Linux 3.0 ARMFixed in: 42.0.5-1

microsoftpatch availablevia msrc

Product: 17984-17084Fixed in: 42.0.5-1

microsoftpatch availablevia msrc

Product: 18171-17084Fixed in: 42.0.5-1

microsoftpatch availablevia msrc

Product: 18244-16823Fixed in: 3.3.2-6

microsoftpatch availablevia msrc

Product: azl3 python-cryptography 3.3.2-5 on Azure Linux 3.0Fixed in: 42.0.5-1

microsoftpatch availablevia msrc

Product: azl3 python-cryptography 42.0.5-1 on Azure Linux 3.0Fixed in: 42.0.5-1

microsoftpatch availablevia msrc

Product: cbl2 python-cryptography 3.3.2-6 on CBL Mariner 2.0Fixed in: 3.3.2-6

microsoftpatch availablevia msrc

Product: CBL Mariner 2.0 x64Fixed in: 3.3.2-6

microsoftpatch availablevia msrc

Product: CBL Mariner 2.0 ARMFixed in: 3.3.2-6

microsoftpatch availablevia msrc

Product: Azure Linux 3.0 x64Fixed in: 42.0.5-1

pippatch availablevia ghsa

Product: cryptographyFixed in: 41.0.6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceFixed in: python-cryptography-0:3.2.1-6.el8_8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsFixed in: python-cryptography-0:3.2.1-6.el8_8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: python3.11-cryptography-0:37.0.2-6.el9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: python-cryptography-0:36.0.1-5.el9_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsFixed in: python-cryptography-0:36.0.1-1.el9_0.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsFixed in: python-cryptography-0:36.0.1-2.el9_2.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.4 Extended Update SupportFixed in: python-cryptography-0:36.0.1-4.el9_4.1

redhatpatch availablevia redhat_api

Product: RHUI 4 for RHEL 8Fixed in: python-cryptography-0:41.0.6-1.el8ui

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: python3.11-cryptography-0:37.0.2-5.el8_8.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnFixed in: python-cryptography-0:3.2.1-4.el8_4.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportFixed in: python-cryptography-0:3.2.1-5.1.el8_6.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceFixed in: python-cryptography-0:3.2.1-5.1.el8_6.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsFixed in: python-cryptography-0:3.2.1-5.1.el8_6.1

redhatpatch availablevia redhat_api

Product: Red Hat Ansible Automation Platform 2.4 for RHEL 8Fixed in: python3x-cryptography-0:42.0.5-1.el8ap

redhatpatch availablevia redhat_api

Product: Red Hat Ansible Automation Platform 2.4 for RHEL 8Fixed in: automation-controller-0:4.5.5-2.el8ap

redhatpatch availablevia redhat_api

Product: Red Hat Ansible Automation Platform 2.4 for RHEL 9Fixed in: automation-controller-0:4.5.5-2.el9ap

redhatpatch availablevia redhat_api

Product: Red Hat Ansible Automation Platform 2.4 for RHEL 9Fixed in: python-cryptography-0:42.0.5-1.el9ap

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: python3.11-cryptography-0:37.0.2-6.el8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: python-cryptography-0:3.2.1-8.el8_10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: python-cryptography-0:3.2.1-4.el8_4.1

redhatvendor investigatingvia redhat_api

Product: Red Hat Certification for Red Hat Enterprise Linux 8Fixed in: redhat-certification-baremetal-container

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: python39:3.9/python-cryptography

redhatno patchvia redhat_api

Product: Red Hat Quay 3Fixed in: quay/quay-rhel8

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: rh-python38-python-cryptography

Vendor Advisories (6)

microsoft2024-Jun/CVE-2023-49083

CVE-2023-49083

denollm-deno-650ac71876afb4f8CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

kerasllm-keras-d13bbd8768a57997CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

pipGHSA-jfhm-5ghh-2f97medium

cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

redhatCVE-2023-49083Moderate

python-cryptography: NULL-dereference when loading PKCS7 certificates

microsoft2023-Nov/CVE-2023-49083Important

cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

References

lists.debian.org / debian-lts-announce/2024/10/msg00012.html

github.com / pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a

Patch

github.com / pyca/cryptography/pull/9926

Issue TrackingPatch

github.com / pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97

ExploitVendor Advisory

lists.fedoraproject.org / archives/list/[email protected]/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV