The libpng library in Red Hat Enterprise Linux 9.6 Extended Update Support contains multiple vulnerabilities: a buffer overflow (CVE-2025-64720), a heap buffer overflow (CVE-2025-65018), and an out-of-bounds read in the png_image_read_composite function (CVE-2025-66293). These vulnerabilities could lead to memory corruption when processing PNG image files. Red Hat Product Security has rated the update as important and has released patched packages (libpng-1.6.37-12.el9_6.1) to address these issues. The advisory covers multiple architectures including x86_64, s390x, ppc64le, and aarch64. Detailed patch instructions are available in the Red Hat advisory RHSA-2026:0210.

The vulnerabilities in libpng can cause buffer overflows and out-of-bounds reads, which may lead to memory corruption. This can potentially be exploited to cause denial of service or other impacts depending on the context in which libpng is used. The advisory does not specify known exploits in the wild. The impact is rated as important by Red Hat, indicating a significant security risk if unpatched.

Red Hat has released updated libpng packages (version 1.6.37-12.el9_6.1) for Red Hat Enterprise Linux 9.6 Extended Update Support and related variants to fix these vulnerabilities. Users should apply these official updates promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the vendor-provided patches.