libpng: libpng: Information disclosure and denial of service via out-of-bounds read/write in Neon palette expansion

A flaw was found in libpng. A remote attacker could exploit an out-of-bounds read and write vulnerability in the ARM/AArch64 Neon-optimized palette expansion path. This occurs when processing a final partial chunk of 8-bit paletted rows without verifying sufficient input pixels, leading to...

CVE-2026-33636

CVE-2026-33636 targets the libpng library. In libpng versions 1.6.36–1.6.55, an ARM/AArch64 Neon-optimized palette expansion path permits an out-of-bounds read and an out-of-bounds write when expanding 8-bit paletted rows to RGB/RGBA. The Neon loop processes a final partial chunk without verifyin...

CVE-2026-33636

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG Portable Network Graphics raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit...