erofs: validate the extent length for uncompressed pclusters

{
  "id": "b658fff0274ae756edc7595664e0eefa4c154a416cce25d8bf2ec3e598345aa8",
  "url": "https://osv.dev/vulnerability/CVE-2022-50746",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "erofs: validate the extent length for uncompressed pclusters",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: erofs: validate the extent length for uncompressed pclusters syzkaller reported a KASAN use-after-free: https://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2 The referenced fuzzed image actually has two issues: - m_pa == 0 as a non-inlined pcluster; - The logical length is longer than its physical length. The first issue has already been addressed. This patch addresses the second issue by checking the extent length validity.",
    "evidence": "osv:CVE-2022-50746",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-50746",
      "aliases": [
        "CVE-2022-50746"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                },
                {
                  "fixed": "dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e"
                },
                {
                  "fixed": "40c73b2ea9611b5388807be406f30f5e4e1162da"
                },
                {
                  "fixed": "c505feba4c0d76084e56ec498ce819f02a7043ae"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50746.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.19.0"
                },
                {
                  "fixed": "6.0.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50746.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.665484692Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/40c73b2ea9611b5388807be406f30f5e4e1162da",
        "https://git.kernel.org/stable/c/c505feba4c0d76084e56ec498ce819f02a7043ae",
        "https://git.kernel.org/stable/c/dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50746.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50746",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50746.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50746",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493138,
  "published_at": "2025-12-24T13:05:42.628+00:00"
}