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.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| libpng | — | 1.6.51-r0 |
References
Similar Threats
- Unknown ALPINE-CVE-2026-40930
- Unknown ALSA-2026:18028
- Unknown ALSA-2026:18064
- Unknown ALSA-2026:14790
- Unknown ALSA-2026:14791
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