CVE-2025-64720

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 v3.1

7.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

EPSS

0.42% chance of exploitation in the next 30 days, 35th percentile

Published

2025-11-24

Updated

2025-11-25

Proof-of-concept exploits (1)

• dantsco/CVE-2025-64720-PoC

References

• CVE Record
• NVD entry

Related

• CVE-2025-6472
• CVE-2025-6473
• CVE-2025-64714
• CVE-2025-6474
• CVE-2025-64711
• CVE-2025-64745