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TI-2026-42309 Aliases CVE-2026-59142GHSA-4m33-8fcc-g5rp

Out-of-bounds read in EGOR Data::HashMap::Shared

Priority MEDIUM 46CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Data::HashMap::Shared versions before 0.14 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in shm_str_copy. The attach-time validator shm_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. shm_str_copy does memcpy(dst, arena + off, len) with off and len read raw from the mmap'd segment and unbounded, on the each, keys, values, pop, shift, take, swap, drain and cursor paths. The get path bounds off and len separately and is not affected. A local peer that can write the backing file can leave the header valid while poisoning a record's offset and length, so iterating or draining the map copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00539 45th percentileScored 2026-11-07
Fix Fixed Data::HashMap::Shared (EGOR): 0.14

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
EGORData::HashMap::Sharedbefore 0.140.14Patch availableCNA
  • Data::HashMap::Shared VendorEGOR Affected before 0.14 Fixed in 0.14 Patch available CNA

Remediation

  • Fix · CNA Data::HashMap::Shared (EGOR) Fixed in 0.14

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    EGOR Data::HashMap::Shared 0.14

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-46470 Link following in EGOR Data::HashMap::SharedPriority LOW 17
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59142
  2. 2026-10-03 Alias added: GHSA-4m33-8fcc-g5rp

References

Other 2

  • TI-2026-42314 Out-of-bounds read in EGOR Data::DisjointSet::Shared CVSS 3.1CRITICAL 9.8
  • TI-2026-42311 Stack-based buffer overflow in EGOR Data::RingBuffer::Shared CVSS 3.1CRITICAL 9.8
  • TI-2026-42312 Out-of-bounds read in EGOR Data::Intern::Shared CVSS 3.1CRITICAL 9.1
  • TI-2026-42308 Out-of-bounds read in EGOR Data::RadixTree::Shared CVSS 3.1CRITICAL 9.1
  • TI-2026-42307 Out-of-bounds read in EGOR Data::SortedSet::Shared CVSS 3.1CRITICAL 9.1
  • TI-2026-42306 Out-of-bounds read in EGOR Data::ReqRep::Shared CVSS 3.1CRITICAL 9.1
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences