CVE-2026-110598 Libyal libpff through 20260926 heap out-of-bounds read via libpff_record_entry_get_multi_value

Libyal libpff through 20260926 contains an integer underflow in libpffrecordentrygetmultivalue that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets. Attackers can craft PST, OST or PAB files with decreasing PTMVSTRING8, PTMVUNICODE or PTMVBINARY offsets ...