This update for libpng16 fixes the following issues:
- CVE-2026-46675: Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP decompression
(bsc#1283183).
Changes for libpng16:
- version update to 1.6.59 (jsc#PED-16190):
* Fixed a regression introduced in version 1.6.47 that caused libpng to reject
hIST chunks in their correct position, after PLTE.
* Prevented a double free of `png_struct` members after an allocation failure.
* Applied fixes and updates to the CMake build.
* Adopted the REUSE Specification for licensing the CI files.
This update for libpng16 fixes the following issue:
- CVE-2026-34757: information disclosure and data corruption due to use-after-free in `png_set_PLTE`, `png_set_tRNS`
and `png_set_hIST` (bsc#1261957).
This update for libpng16 fixes the following issue:
- CVE-2026-33416: use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE` can lead to arbitrary code
execution (bsc#1260754).
This update for libpng16 fixes the following issues:
- CVE-2026-25646: heap buffer overflow vulnerability in png_set_dither/png_set_quantize (bsc#1258020).
This update for libpng16 fixes the following issues:
- CVE-2025-66293: out-of-bounds read of the `png_sRGB_base` array when processing palette PNG images with partial
transparency and gamma correction (bsc#1254480).
This update for libpng16 fixes the following issues:
- CVE-2025-64720: Fixed buffer overflow in `png_image_read_composite` via
incorrect palette premultiplication (bsc#1254159)
- CVE-2025-64505: Fixed heap buffer over-read in `png_do_quantize` via
malformed palette index (bsc#1254157)
- CVE-2025-64506: Fixed heap buffer over-read in `png_write_image_8bit`
with 8-bit input and `convert_to_8bit` enabled (bsc#1254158)
- CVE-2025-65018: Fixed heap buffer overflow in `png_combine_row`
triggered via `png_image_finish_read` (bsc#1254160)