CVE-2026-39892 (GCVE-0-2026-39892)

Vulnerability from cvelistv5 – Published: 2026-04-08 20:49 – Updated: 2026-07-01 12:04
VLAI
Title
cryptography has a buffer overflow if non-contiguous buffers were passed to APIs
Summary
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
URL Tags
https://github.com/pyca/cryptography/security/adv… x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2026/0…
https://access.redhat.com/security/cve/CVE-2026-39892 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2456735 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:24761 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24762 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30089 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30088 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24866 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:20338 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7295 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24977 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22840 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22629 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21017 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24853 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19375 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22465 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23361 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24483 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
pyca cryptography Affected: >= 45.0.0, < 46.0.7
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Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8     cpe:/a:redhat:ansible_automation_platform:2.5::el8
    cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8
    cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8
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Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 9     cpe:/a:redhat:ansible_automation_platform:2.5::el9
    cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9
    cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
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Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 9     cpe:/a:redhat:ansible_automation_platform:2.6::el9
    cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9
    cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9
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Red Hat Red Hat AI Inference Server 3.3     cpe:/a:redhat:ai_inference_server:3.3::el9
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Red Hat Red Hat Ansible Automation Platform 2.6     cpe:/a:redhat:ansible_automation_platform:2.6::el9
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Red Hat Red Hat Discovery 2     cpe:/a:redhat:discovery:2::el9
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Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat OpenShift AI 2.25     cpe:/a:redhat:openshift_ai:2.25::el9
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Red Hat Red Hat Quay 3.10     cpe:/a:redhat:quay:3.10::el8
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Red Hat Red Hat Quay 3.12     cpe:/a:redhat:quay:3.12::el8
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Red Hat Red Hat Quay 3.14     cpe:/a:redhat:quay:3.14::el8
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Red Hat Red Hat Quay 3.15     cpe:/a:redhat:quay:3.15::el8
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Red Hat Red Hat Quay 3.16     cpe:/a:redhat:quay:3.16::el9
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Red Hat Red Hat Quay 3.17     cpe:/a:redhat:quay:3.17::el9
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Red Hat Red Hat Quay 3.9     cpe:/a:redhat:quay:3.9::el8
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Red Hat Red Hat Trusted Artifact Signer 1.4     cpe:/a:redhat:trusted_artifact_signer:1.4::el9
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Red Hat Lightspeed Core     cpe:/a:redhat:lightspeed_core
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Red Hat Migration Toolkit for Applications 8     cpe:/a:redhat:migration_toolkit_applications:8
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Red Hat Red Hat AI Inference Server     cpe:/a:redhat:ai_inference_server:3
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Red Hat Red Hat Ansible Automation Platform 2     cpe:/a:redhat:ansible_automation_platform:2
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Red Hat Red Hat Ansible Automation Platform Ansible Core 2     cpe:/a:redhat:ansible_core:2
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3     cpe:/a:redhat:enterprise_linux_ai:3
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
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Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
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Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 10     cpe:/a:redhat:ansible_automation_platform:2.6::el10
    cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10
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Red Hat OpenShift Lightspeed     cpe:/a:redhat:openshift_lightspeed
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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.