SB2026011311 - Multiple vulnerabilities in libpng

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2026-22801)

The vulnerability allows a remote attacker to gain access to potentially sensitive information or crash the application.

The vulnerability exists due to integer truncation within the png_write_image_16bit() and png_write_image_8bit() functions. A remote attacker can supply a specially crafted PNG file to the application, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.

2) Out-of-bounds read (CVE-ID: CVE-2026-22695)

The vulnerability allows a remote attacker to gain access to potentially sensitive information or crash the application.

The vulnerability exists due to a boundary condition within the png_image_finish_read() function when reading 16-bit PNG images with 8-bit output format and non-minimal row stride. A remote attacker can supply a specially crafted PNG image file to the application, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.

Note, the vulnerability exists due to an incomplete fix for #VU118777 (CVE-2025-65018).

Remediation

Install update from vendor's website.

References

• https://github.com/pnggroup/libpng/security/advisories/GHSA-vgjq-8cw5-ggw8
• https://github.com/pnggroup/libpng/commit/cf155de014fc6c5cb199dd681dd5c8fb70429072
• https://github.com/pnggroup/libpng/security/advisories/GHSA-mmq5-27w3-rxpp
• https://github.com/pnggroup/libpng/issues/778
• https://github.com/pnggroup/libpng/commit/e4f7ad4ea2