Pillow Vulnerable to Write Buffer Overflow on BCn encoding
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-48379US | medium5.5 | — | ||
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) imag… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/python-pillow/Pillow/commit/ef98b3510e3e4f14b547762764813d7e5ca3c5a4FIX
- https://github.com/python-pillow/Pillow/pull/9041EVIDENCE
- https://github.com/python-pillow/Pillow/releases/tag/11.3.0ARTICLE
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-xg8h-j46f-w952ADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2025-48379WEB
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