{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Data-RingBuffer-Shared",
          "product": "Data::RingBuffer::Shared",
          "programFiles": [
            "ring.h"
          ],
          "programRoutines": [
            {
              "name": "ring_read_seq"
            }
          ],
          "repo": "https://github.com/vividsnow/perl5-data-ringbuffer-shared",
          "vendor": "EGOR",
          "versions": [
            {
              "lessThan": "0.04",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq.\n\nThe 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\u0027d segment, copying into a fixed 8-byte destination scalar. An elem_size larger than 8 bytes writes past the destination.\n\nA 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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "CWE-121 Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-21T19:04:20.191Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/EGOR/Data-RingBuffer-Shared-0.04/diff/EGOR/Data-RingBuffer-Shared-0.03#ring.h"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/EGOR/Data-RingBuffer-Shared-0.04/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Data::RingBuffer::Shared 0.04 or later, which pins elem_size to the fixed element size of the buffer\u0027s registered variant."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq",
      "workarounds": [
        {
          "lang": "en",
          "value": "For deployments that cannot upgrade to 0.04, place the backing file in a directory writable only by the owning user, so a local peer cannot tamper with the elem_size the read path trusts."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-59144",
    "datePublished": "2026-07-21T19:04:20.191Z",
    "dateReserved": "2026-07-02T16:24:17.913Z",
    "dateUpdated": "2026-07-21T19:04:20.191Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}