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Advisory severityHigh8.2Red Hat Linux

High [CVE-2026-59197] Native heap out-of-bounds write

This high-severity Red Hat Linux advisory covers CVE-2026-59197 affecting Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 9.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-59197 Source published Source updated

VulniPulse record published Record updated

CVE-2026-59197
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

Pillow is a Python imaging library. Prior to 12.3.0, Pillow's public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size because ImageFilter.

RankFilter.filter() calls image.expand(size // 2, size // 2) before rank-filter size validation and ImagingExpand() computes output dimensions with unchecked signed int arithmetic. This issue is fixed in version 12.3.0.

This can lead to denial of service and limited integrity impact via heap corruption. A remote attacker who can drive RankFilter with attacker-controlled sizes may crash the process or corrupt heap memory.

Red Hat severity: Important — CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H). Weakness: CWE-787.

Affected products named by the advisory: Red Hat Ansible Automation Platform 2.5 for RHEL 8; Red Hat Ansible Automation Platform 2.5 for RHEL 9; Red Hat Ansible Automation Platform 2.6 for RHEL 9; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 26 more.

Affected products named by the advisory: Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; and 22 more.

Is CVE-2026-59197 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-59197 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-59197?

Upgrade to a fixed release named by Red Hat:

  • 12.3.0
  • python3.12-pillow-0:12.3.0-1.el8ap
  • python3.12-pillow-0:12.3.0-1.el9ap
  • python-pillow-0:5.1.1-23.el8_10
  • python-pillow-0:5.1.1-15.el8_4.2
  • python-pillow-0:5.1.1-20.el8_6.1
  • python-pillow-0:5.1.1-20.el8_8.1
  • python-pillow-0:12.3.0-1.el8pc
  • python-pillow-0:12.3.0-1.el9pc
  • rhaii/vllm-spyre-rhel9:1789681201
  • rhaii/vllm-cpu-rhel9:1789681128
  • rhaii/vllm-cuda-rhel9:1789681126

38 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions
  • < 12.3.0

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Fixed versions
  • 12.3.0
  • python3.12-pillow-0:12.3.0-1.el8ap
  • python3.12-pillow-0:12.3.0-1.el9ap
  • python-pillow-0:5.1.1-23.el8_10
  • python-pillow-0:5.1.1-15.el8_4.2
  • python-pillow-0:5.1.1-20.el8_6.1
  • python-pillow-0:5.1.1-20.el8_8.1
  • python-pillow-0:12.3.0-1.el8pc
  • python-pillow-0:12.3.0-1.el9pc
  • rhaii/vllm-spyre-rhel9:1789681201
  • rhaii/vllm-cpu-rhel9:1789681128
  • rhaii/vllm-cuda-rhel9:1789681126
  • rhaii/model-opt-cuda-rhel9:1789681126
  • rhaii/vllm-rocm-rhel9:1789681126
  • rhaii/vllm-cpu-rhel9:1790075793
  • rhaii/vllm-spyre-rhel9:1790076141
  • rhaii/vllm-cuda-rhel9:1790090131
  • rhaii/vllm-rocm-rhel9:1790109620
  • rhaii/model-opt-cuda-rhel9:1790076498
  • ansible-automation-platform-26/hub-rhel9:1785753568
  • ansible-automation-platform-26/lightspeed-chatbot-rhel9:1785646188
  • ansible-automation-platform-27/hub-rhel9:1785376164
  • ansible-automation-platform-27/lightspeed-chatbot-rhel9:1785426734
  • rhelai3/disk-image-cuda-rhel9:1790957417
  • rhelai3/bootc-aws-cuda-rhel9:1790881122
  • rhelai3/bootc-azure-cuda-rhel9:1790881120
  • rhelai3/bootc-azure-rocm-rhel9:1790707552
  • rhelai3/bootc-cuda-rhel9:1790868254
  • rhelai3/bootc-gcp-cuda-rhel9:1790881123
  • rhelai3/bootc-rocm-rhel9:1790614447
  • rhoai/odh-llm-d-inference-scheduler-rhel9:1789662430
  • rhoai/odh-mlflow-rhel9:1789653606
  • rhoai/odh-automl-rhel9:1786612415
  • rhoai/odh-autorag-rhel9:1786612637
  • rhoai/odh-llm-d-kv-cache-rhel9:1787169432
  • rhoai/odh-mlflow-rhel9:1787226790
  • rhoai/odh-openvino-model-server-rhel9:1787303251
  • rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9:1787073866
  • rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9:1787073873
  • rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9:1787073459
  • rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9:1787073611
  • RHSA-2026:50319
  • RHSA-2026:50336
  • RHSA-2026:48021
  • RHSA-2026:52551
  • RHSA-2026:54528
  • RHSA-2026:54417
  • RHSA-2026:50223
  • RHSA-2026:69464
  • RHSA-2026:69466

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Mitigation

Upgrade to a fixed release: 12.3.0, python3.12-pillow-0:12.3.0-1.el8ap, python3.12-pillow-0:12.3.0-1.el9ap, python-pillow-0:5.1.1-23.el8_10, python-pillow-0:5.1.1-15.el8_4.2, python-pillow-0:5.1.1-20.el8_6.1. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

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