Heap-based buffer overflow in Pillow - CVE-2025-48379

Vulnerability identifier: #VU113003

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-48379

CWE-ID: CWE-122

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error on BCn encoding. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Pillow
IBM Concert Software
IBM Fusion HCI
watsonx Orchestrate with watsonx Assistant Cartridge - Document Processing Component
Maximo Application Suite - Predict Component

Install updates from vendor's website.

Pillow - update to 11.3.0
IBM Concert Software - update to 2.0.0
IBM Fusion HCI - update to 2.11.0
watsonx Orchestrate with watsonx Assistant Cartridge - Document Processing Component - update to 5.2.1
Maximo Application Suite - Predict Component - update to 9.1.1

• https://github.com/python-pillow/Pillow/commit/ef98b3510e3e4f14b547762764813d7e5ca3c5a4
• https://github.com/python-pillow/Pillow/pull/9041
• https://github.com/python-pillow/Pillow/releases/tag/11.3.0
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-xg8h-j46f-w952

• Heap-based buffer overflow in Pillow
• Multiple vulnerabilities in IBM Concert Software
• IBM watsonx Orchestrate with watsonx Assistant Cartridge - Document Processing Component update for Pillow
• Multiple vulnerabilities in IBM Fusion
• IBM Maximo Application Suite - Predict Component update for Pillow