libewf through 20260924 Heap Out-of-Bounds Read via L01 Extended Attribute Parsing

{
  "id": "9a915a1d60b3b9c4ddfea6f2e3c424bba1be2705d2621378e7c4374bc0691807",
  "url": "https://osv.dev/vulnerability/CVE-2026-111159",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libewf through 20260924 Heap Out-of-Bounds Read via L01 Extended Attribute Parsing",
    "summary": "libewf through 20260924 contains a heap out-of-bounds read vulnerability in libewf_lef_extended_attribute_read_data() because UTF-16 name and value sizes are validated before being doubled. Attackers can supply a crafted .L01/.Lx01 file with oversized 'ea' metadata counts to crash the application or leak uninitialized heap memory through extended attributes.",
    "evidence": "osv:CVE-2026-111159",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-111159",
      "aliases": [
        "CVE-2026-111159"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libyal/libewf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "d76fd0bb21601e2969bc88ffdaeb861023f6a5b2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "20260924"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "20260924"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "20260924",
            "20240506"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111159.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.496086626Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111159.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111159",
        "https://www.vulncheck.com/advisories/libewf-through-20260924-heap-out-of-bounds-read-via-l01-extended-attribute-parsing",
        "https://github.com/libyal/libewf",
        "https://github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/libewf_lef_extended_attribute.c#L362-L408",
        "https://github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/libewf_lef_extended_attribute.c#L456-L560",
        "https://hackmd.io/@haind-pwn/libewf-lef-extended-attribute-utf16-size-oob-read"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111159.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111159",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509205,
  "published_at": "2026-10-15T18:57:47.615+00:00"
}