PT-2026-62052 · Egor · Data::Intern::Shared
CVE-2026-59145
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Published
2026-07-21
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Updated
2026-07-21
None
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Data::Intern::Shared versions before 0.02 for Perl allow an out-of-bounds read via unvalidated slot, reverse and arena indices in si idx find.
The attach-time validator si validate header is thorough about the header and layout (magic, version, section offsets, total size, count and arena used) but does not validate the three arrays it then trusts. Every lookup in si idx find walks a triple indirection read straight from the mmap'd segment, arena[reverse[slots[i].id]], with no bound on slots[i].id against count, on the reverse[id] arena offset against arena used, or on the arena record's length prefix.
A local peer that can write the backing file can leave the header valid while poisoning a slot id, a reverse offset or an arena length prefix, so an id of, intern or string lookup dereferences the chain out of bounds; because string() returns a file-controlled length of bytes from the arena, adjacent process memory can be disclosed.
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Data::Intern::Shared