High

JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization

Type: advisorySources: OSV

In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component fails to perform cross-field validation on attacker-controlled `_size`, `_paddingSize`, and `_dataOffset` fields during `DataDescriptor` message deserialization. An unauthenticated remote attacker can send a crafted network payload that triggers an unsigned integer underflow in `DataDescriptor::getPayloadSize()` and `DataDescriptor::getNextDescriptor()`. This results in an out-of-bounds heap read and an immediate process crash (SIGSEGV), causing a denial of service.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-111075
Confirmed fixed CVEs: Not specified
Updated in this feed: 8 Nov 2026, 03:39 UTC · Revision 1

Source evidence

JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization

core-osv · Original source

Published 21 Oct 2026, 08:00 UTC

osv:CVE-2026-111075

Complete source record

{
  "id": "3886583781ff7eea0d843a25811ab71570c7eb3fd7ec40e0751b9d64bc0e04c2",
  "url": "https://osv.dev/vulnerability/CVE-2026-111075",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization",
    "summary": "In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component fails to perform cross-field validation on attacker-controlled `_size`, `_paddingSize`, and `_dataOffset` fields during `DataDescriptor` message deserialization. An unauthenticated remote attacker can send a crafted network payload that triggers an unsigned integer underflow in `DataDescriptor::getPayloadSize()` and `DataDescriptor::getNextDescriptor()`. This results in an out-of-bounds heap read and an immediate process crash (SIGSEGV), causing a denial of service.",
    "evidence": "osv:CVE-2026-111075",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-111075",
      "aliases": [
        "CVE-2026-111075"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eclipse-openj9/openj9",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e24e8aa9bdffadfff8564ac605b0003928dcd1aa"
                },
                {
                  "fixed": "dcc7ee16aa406d7f647f453cabb7df8f4f96dae9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.8.0"
                      },
                      {
                        "fixed": "0.63"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.63.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "openj9-0.35.0-m1",
            "openj9-0.33.0-m1",
            "openj9-0.30.0-m1a",
            "openj9-0.30.0-m1",
            "openj9-0.29.0-m1",
            "openj9-0.27.0-m1",
            "openj9-0.26.0-m1",
            "openj9-0.24.0-m1",
            "openj9-0.23.0-m1",
            "openj9-0.22.0-m1",
            "openj9-0.21.0-m1",
            "openj9-0.20.0-m1",
            "openj9-0.19.0-m1",
            "openj9-0.18.0-m1",
            "openj9-0.17.0-m1",
            "openj9-0.16.0-m1",
            "openj9-0.12.0-rc1",
            "openj9-0.12.0-m2",
            "openj9-0.12.0-m1",
            "openj9-0.11.0-rc2",
            "openj9-0.11.0",
            "openj9-0.11.0-rc1",
            "openj9-0.10.0-rc1",
            "openj9-0.9.0-rc1",
            "openj9-0.8.0-rc2",
            "openj9-0.8.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111075.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.221100817Z",
      "provider": "osv",
      "references": [
        "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/423",
        "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/941",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111075.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111075",
        "https://github.com/eclipse-openj9/openj9/pull/25009"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125",
          "CWE-191"
        ],
        "cna_assigner": "eclipse",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111075.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111075",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522288,
  "published_at": "2026-10-21T08:00:32.804+00:00"
}