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Fencer Vulns
high 7.5

CVE-2024-26130 json

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

published 2024-02-21 2 y ago modified 2026-09-10 1 mo ago also EUVD-2024-0031 , GHSA-6vqw-3v5j-54x4 , PYSEC-2024-225

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi cryptography 42.0.4
  • cryptography_project cryptography 42.04
  • python-cryptography Debian 12 38.0.4-3+deb12u1
  • python-cryptography Debian 14, Debian 13 42.0.5-1

debian advisories DEBIAN-CVE-2024-26130

  • python-cryptography Ubuntu 24.04 LTS 41.0.7-4ubuntu0.1

ubuntu advisories UBUNTU-CVE-2024-26130

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python3.12-cryptography RHEL 9 41.0.7-2.el9_6.1
  • python-django rhui 4 4.2.15-1.el8ui
  • python-grpcio rhui 4 1.65.4-1.el8ui
  • python-jinja2 rhui 4 3.1.4-1.el8ui
  • python-aiohttp rhui 4 3.9.4-1.el8ui
  • python-gunicorn rhui 4 22.0.0-1.0.1.el8ui
  • python-requests rhui 4 2.32.3-2.el8ui
  • python-sqlparse rhui 4 0.5.0-1.el8ui

red hat advisories RHSA-2025:15608RHSA-2025:1335RHSA-2024:7987RHSA-2024:3781

  • python-cryptography SLE Module for Python 3 15 SP6, openSUSE Leap 15.6 41.0.3-150600.23.3.1
  • python-cryptography SLE Module for Python 3 15 SP5, openSUSE Leap 15.5 41.0.3-150400.16.15.1

suse advisories SUSE-SU-2024:2138-1SUSE-SU-2024:0763-1

  • python-cryptography openSUSE Tumbleweed 50.0.0-1.1
  • python-cryptography openSUSE Tumbleweed 42.0.4-1.1

opensuse advisories openSUSE-SU-2026:11468-1openSUSE-SU-2024:13710-1

  • python3.12-cryptography AlmaLinux 9 41.0.7-2.el9_6.1

almalinux advisories ALSA-2025:15608

  • python3.12-cryptography Rocky Linux 9 41.0.7-2.el9_6.1

rocky linux advisories RLSA-2025:15608

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-26130 updated cvss 7.5

python-cryptography: NULL pointer dereference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override

  • Red Hat Ansible Automation Platform 2.4 for RHEL 8 python39-cryptography 42.0.5-1.el8ap, python3x-cryptography 42.0.5-1.el8ap Red Hat Ansible Automation Platform 2.4 for RHEL 9 python-cryptography 42.0.5-1.el9ap, python3-cryptography 42.0.5-1.el9ap
    fixed: vendor fix RHSA-2024:3781
  • Red Hat Enterprise Linux AppStream (v. 9) python3.12-cryptography 41.0.7-2.el9_6.1
    fixed: vendor fix RHSA-2025:15608
  • Red Hat Satellite 6.15 for RHEL 8 python-cryptography 42.0.8-1.el8pc, python3.11-cryptography 42.0.8-1.el8pc, rubygem-foreman_theme_satellite 13.3.0-0.1.el8sat
    fixed: vendor fix RHSA-2024:7987
  • Red Hat RHUI 4 for RHEL 8 python-cryptography 42.0.8-1.el8ui, python3.11-cryptography 42.0.8-1.el8ui
    fixed: vendor fix RHSA-2025:1335
  • Red Hat Ansible Automation Platform 2.4 for RHEL 8 receptor 1.4.8-1.el8ap, python39-idna 3.7-1.el8ap, python3x-idna 3.7-1.el8ap, receptorctl 1.4.8-1.el8ap, ansible-core 2.15.11-1.el8ap, ansible-test 2.15.11-1.el8ap, +37 more Red Hat Ansible Automation Platform 2.4 for RHEL 9 receptor 1.4.8-1.el9ap, python-idna 3.7-1.el9ap, python3-idna 3.7-1.el9ap, receptorctl 1.4.8-1.el9ap, python-black 22.8.0-2.el9ap, python-jinja2 3.1.4-1.el9ap, +37 more Red Hat Enterprise Linux 7 python-cryptography, python2-cryptography Red Hat Enterprise Linux 8 python-cryptography, python3-cryptography Red Hat Enterprise Linux 9 python-cryptography, python3-cryptography, python3.11-cryptography Red Hat Satellite 6.15 for RHEL 8 foreman 3.9.1.10-1.el8sat, satellite 6.15.4-2.el8sat, python-django 4.2.15-1.el8pc, foreman-cli 3.9.1.10-1.el8sat, foreman-ec2 3.9.1.10-1.el8sat, foreman-pcp 3.9.1.10-1.el8sat, +28 more
    +1 more products
    Red Hat RHUI 4 for RHEL 8 libcomps 0.1.21-1.el8ui, python-jq 1.6.0-4.el8ui, python-xlrd 2.0.1-9.el8ui, python-xlwt 1.3.0-7.el8ui, python-yarl 1.8.2-5.el8ui, python-zipp 3.4.0-8.el8ui, +196 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi cryptography
>=38.0.0, <42.0.4
42.0.4

Affected products

  • pyca cryptography
  • cryptography_project cryptography

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.