Packages
- libpng1.6 - PNG (Portable Network Graphics) file library
Details
It was discovered that libpng incorrectly handled memory when processing
certain PNG files. If a user or automated system were tricked into opening
a specially crafted PNG file, an attacker could use this issue to cause
libpng to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2026-33416)
It was discovered that libpng incorrectly handled expanding 8-bit paletted
rows to RGB or RGBA on ARM processors. If a user or automated system were
tricked into opening a specially crafted PNG file, an attacker could use
this issue to cause libpng to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2026-33636)
It was discovered that libpng incorrectly handled certain setter APIs. An
attacker could possibly use this issue to obtain sensitive information.
(
It was discovered that libpng incorrectly handled memory when processing
certain PNG files. If a user or automated system were tricked into opening
a specially crafted PNG file, an attacker could use this issue to cause
libpng to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2026-33416)
It was discovered that libpng incorrectly handled expanding 8-bit paletted
rows to RGB or RGBA on ARM processors. If a user or automated system were
tricked into opening a specially crafted PNG file, an attacker could use
this issue to cause libpng to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2026-33636)
It was discovered that libpng incorrectly handled certain setter APIs. An
attacker could possibly use this issue to obtain sensitive information.
(CVE-2026-34757)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.10 questing | libpng16-16t64 – 1.6.50-1ubuntu0.5 | ||
| 24.04 LTS noble | libpng16-16t64 – 1.6.43-5ubuntu0.6 | ||
| 22.04 LTS jammy | libpng16-16 – 1.6.37-3ubuntu0.5 | ||
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