CVE-2026-59140
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk26th percentile - higher than 26% of all known CVEs
Summary
Perl module Data::SortedSet::Shared before version 0.03 contains an out-of-bounds read vulnerability via unvalidated node indices in rank, min, and max queries. A local user who can write the backing file can poison tree links, leading to out-of-bounds read or process crash.
Risk Assessment
Risk of reading sensitive memory data or process crash by a local attacker.
Recommendation
Update the Data::SortedSet::Shared module to version 0.03 or later.
Original NVD description (English source)
Data::SortedSet::Shared versions before 0.03 for Perl allow an out-of-bounds read via unvalidated node indices in the rank and min/max query paths. The attach-time validator ss_validate_header bounds only the root index against the node pool (node_capacity). The order-statistics and min/max queries then follow children[], leftmost and rightmost node indices read raw from the mmap'd segment without bounding them against node_capacity. A full structural check (ss_validate_tree) exists but runs only via an explicit validate method, not on attach. A local peer that can write the backing file can leave the header valid while poisoning the tree links, so the next rank, min or max query dereferences an out-of-bounds node index, reading adjacent memory or crashing the process.