HCE2-SA-2026-0020 Important HCE 2.0 Security Fix(es): 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, a heap buffer over-read vulnerability exists in libpng_x27;s png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51. (CVE-2025-64506) LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng_x27;s png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. This issue has been patched in version 1.6.51. (CVE-2025-64505) LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng_x27;s simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng_x27;s internal state management. Upgrade to libpng 1.6.52 or later. (CVE-2025-66293) 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. (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, there is a heap buffer overflow vulnerability in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. This issue has been patched in version 1.6.51. (CVE-2025-65018) HCE 2.0 libpng-1.6.37-2.r3.hce2.x86_64.rpm libpng-devel-1.6.37-2.r3.hce2.x86_64.rpm libpng-help-1.6.37-2.r3.hce2.x86_64.rpm libpng-static-1.6.37-2.r3.hce2.x86_64.rpm libpng-tools-1.6.37-2.r3.hce2.x86_64.rpm libpng-1.6.37-2.r3.hce2.aarch64.rpm libpng-devel-1.6.37-2.r3.hce2.aarch64.rpm libpng-help-1.6.37-2.r3.hce2.aarch64.rpm libpng-static-1.6.37-2.r3.hce2.aarch64.rpm libpng-tools-1.6.37-2.r3.hce2.aarch64.rpm