CVE-2026-4426 | libarchive ISO File Parser pz_log2_bs incorrect bitwise shift of integer

A vulnerability, which was classified as problematic, was found in libarchive. The impacted element is an unknown function of the component ISO File Parser. Such manipulation of the argument pz_log2_bs leads to incorrect bitwise shift of integer.

This vulnerability is referenced as CVE-2026-4426. It is possible to launch the attack remotely. No exploit is available.