libpng15 vulnerabilities (Red Hat)

2 vulnerabilities.

• libpng15 Red Hat LIBPNG has use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE` CVE-2026-33416 Fix available 7.5 HighMarch 26, 2026
• libpng15 Red Hat LIBPNG has a heap buffer overflow in png_set_quantize CVE-2026-25646 Fix available 8.3 HighFebruary 10, 2026