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
Summary
| CVE | CVE-2026-59146 |
|---|---|
| State | PUBLISHED |
| Assigner | CPANSec |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-21 20:17:03 UTC |
| Updated | 2026-07-21 20:17:03 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-125 | CWE-787 | CWE-787 CWE-787 Out-of-bounds Write | CWE-125 CWE-125 Out-of-bounds Read
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | EGOR | DataSpatialHashShared | affected 0.02 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| metacpan.org/release/EGOR/Data-SpatialHash-Shared-0.02/changes | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| metacpan.org/release/EGOR/Data-SpatialHash-Shared-0.02/diff/EGOR/Data-Spat... | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: Upgrade to Data::SpatialHash::Shared 0.02 or later, which bounds every entry index against the entry count before dereferencing it.
Workarounds
CNA: 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.
There are currently no legacy QID mappings associated with this CVE.