Buffer overflow in Python Pillow
CVE-2025-48379
Pillow is a Python imaging library. In versions 11.2.0 to before 11.3.0, there is a heap buffer overflow when writing a sufficiently large (>64k encoded with default settings) image in the DDS format due to writing into a buffer without checking for available space. This only affects users who save untrusted data as a compressed DDS image. This issue has been patched in version 11.3.0.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (20.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Python Pillow — versions 11.2.1
- Python-Pillow Pillow — versions >= 11.2.0, < 11.3.0
Weakness classification (CWE)
References
- github.com/python-pillow/Pillow/security/advisories/GHSA-xg8h-j46f-w952 (Vendor Advisory)
- github.com/python-pillow/Pillow/pull/9041 (Exploit, Issue Tracking)
- github.com/python-pillow/Pillow/commit/ef98b3510e3e4f14b547762764813d7e5ca3c5a4 (Patch)
- github.com/python-pillow/Pillow/releases/tag/11.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2025-48379?
- CVE-2025-48379 is a high-severity vulnerability in Python Pillow, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2025-07-01.
- How severe is CVE-2025-48379?
- High severity. CVSS v3 base score is 7.1 out of 10.