Most applications, including Firefox, are not vulnerable to a pair of memory corruption vulnerabilities patched in the libpng PNG reference library. Two memory corruption vulnerabilities in the PNG reference library, libpng, have been patched, but the scope of software affected by the bug isn’t as wide as initially reported. The vulnerabilities, addressed in libpng 1.0.64, 1.2.54, 1.4.17, 1.5.24,