libpng-1.6.56-1.fc43
- libpng-1.6.56-1.fc43
1.6.56 is release fixes for the following two security vulnerabilities:
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CVE-2026-33416 (high severity): Use-after-free memory bug in the transparency and palette-handling code. Similar to its predecessor CVE-2026-25646, this latent bug has existed for 25 years. Both Halil Oktay and Ryo Shimada discovered it within days of one another.
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CVE-2026-33636 (high severity): Out-of-bounds read and write vulnerability in the ARM Neon palette-expansion code. This one was found and fixed by Taegu Ha and has existed since 1.6.36.
The images that trigger these bugs are valid. Users are encouraged to update immediately.