CVE-2026-59142

CVE-2026-59142 affects Data::HashMap::Shared for Perl versions before 0.14. The issue is an out-of-bounds read caused by unvalidated arena offsets/lengths in shm_str_copy, where memcpy(dst, arena + off, len) uses values sourced from the mmap’d segment. Although the attach-time validator shm_valid...

CVE-2026-59142

Data::HashMap::Shared versions before 0.14 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in shmstrcopy. The attach-time validator shmvalidateheader checks the header scalars and region layout against the file size, but does not validate the array contents it then...