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TI-2026-42311 Aliases CVE-2026-59144GHSA-jxx5-5g59-8f3j

Stack-based buffer overflow in EGOR Data::RingBuffer::Shared

Priority MEDIUM 50CWE-121Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq. The attach-time validator ring_validate_header checks the capacity-overflow and total_size consistency of the header but never caps elem_size against the destination size. ring_read_seq does memcpy(out, ring_slot(h, seq), elem_size) with elem_size read raw from the mmap'd segment, copying into a fixed 8-byte destination scalar. An elem_size larger than 8 bytes writes past the destination. A local peer that can write the backing file can leave the header valid while setting a large elem_size, so the next read copies a file-controlled length into the fixed 8-byte stack buffer, corrupting adjacent stack frames.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00598 48th percentileScored 2026-11-07
Fix Fixed Data::RingBuffer::Shared (EGOR): 0.04

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

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::RingBuffer::Sharedbefore 0.040.04Patch availableCNA
  • Data::RingBuffer::Shared VendorEGOR Affected before 0.04 Fixed in 0.04 Patch available CNA

Remediation

  • Fix · CNA Data::RingBuffer::Shared (EGOR) Fixed in 0.04

Fixed in the same release

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

  • Release ·

    EGOR Data::RingBuffer::Shared 0.04

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-46472 Link following in EGOR Data::RingBuffer::SharedPriority LOW 17
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59144
  2. 2026-10-03 Alias added: GHSA-jxx5-5g59-8f3j

References

Other 2

  • TI-2026-42314 Out-of-bounds read in EGOR Data::DisjointSet::Shared CVSS 3.1CRITICAL 9.8
  • TI-2026-42312 Out-of-bounds read in EGOR Data::Intern::Shared CVSS 3.1CRITICAL 9.1
  • TI-2026-42309 Out-of-bounds read in EGOR Data::HashMap::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