Vulnerability Description
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libpng | Libpng | >= 1.6.0, < 1.6.51 |
Related Weaknesses (CWE)
References
- https://github.com/pnggroup/libpng/commit/08da33b4c88cfcd36e5a706558a8d7e0e47736Patch
- https://github.com/pnggroup/libpng/issues/686ExploitIssue Tracking
- https://github.com/pnggroup/libpng/pull/751Issue TrackingPatch
- https://github.com/pnggroup/libpng/security/advisories/GHSA-hfc7-ph9c-wcwwExploitVendor Advisory
- https://github.com/pnggroup/libpng/security/advisories/GHSA-hfc7-ph9c-wcwwExploitVendor Advisory
FAQ
What is CVE-2025-64720?
CVE-2025-64720 is a vulnerability with a CVSS score of 7.1 (HIGH). LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read v...
How severe is CVE-2025-64720?
CVE-2025-64720 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-64720?
Check the references section above for vendor advisories and patch information. Affected products include: Libpng Libpng.