CVE-2026-59146

Summary

Data::SpatialHash::Shared versions before 0.02 for Perl allow out-of-bounds reads and writes via unvalidated bucket, link and free-list indices in sph_walk_cell and sph_alloc_slot.

The attach-time validator sph_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. sph_walk_cell reads entries[buckets[b]] and follows each entry's next link raw, and sph_alloc_slot writes through a file-stored free_head index, none bounded against the entry count (max_entries).

A local peer that can write the backing file can leave the header valid while poisoning the bucket chain and free list, so a query reads through an out-of-bounds bucket and next index and an insert writes through an out-of-bounds free-list head, corrupting memory or crashing the process.

Affected Software

VendorProductVersion RangeStatus
EGORData::SpatialHash::Shared0 < 0.02affected

Weaknesses

  • CWE-787: CWE-787 Out-of-bounds Write
  • CWE-125: CWE-125 Out-of-bounds Read

Workarounds

For deployments that cannot upgrade to 0.02, place the backing file in a directory writable only by the owning user, so a local peer cannot tamper with the bucket chain and free list.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References