CVE-2015-8540: Debian Linux

High severity, CVSS 8.8. EPSS: 6.5% chance of exploitation in the next 30 days.

Integer underflow in the png_check_keyword function in pngwutil.c in libpng 0.90 through 0.99, 1.0.x before 1.0.66, 1.1.x and 1.2.x before 1.2.56, 1.3.x and 1.4.x before 1.4.19, and 1.5.x before 1.5.26 allows remote attackers to have unspecified impact via a space character as a keyword in a PNG image, which triggers an out-of-bounds read.

Affected products

• Debian Debian Linux: version 6.0 only
• Fedoraproject Fedora: version 23 only
• Libpng Libpng: version 1.2.0 only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.4 only; version 1.2.5 only; …
• Red Hat Enterprise Linux Desktop Supplementary: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Hpc Node: version 6.0 only
• Red Hat Enterprise Linux Server Supplementary: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Workstation Supplementary: version 6.0 only

Published 2016-04-14. Last modified 2026-06-17.