{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37"
            },
            {
              "fixed": "a9a6ec1298f9bc134b2c5db27d25bb10603b7113"
            },
            {
              "fixed": "35fc83c65faf7949f5701bb34b20f822560a7718"
            },
            {
              "fixed": "74637f7fef030e5fb2e835b7dfeb05efdc48e0fe"
            },
            {
              "fixed": "6ec53ccab0d691b3c73e03d930343ca45987e88d"
            },
            {
              "fixed": "1399f102d8a1855c1a38506057306ec79d0787d9"
            },
            {
              "fixed": "e1e342d9a561c016b8531ec1f4dcefaad9d64954"
            },
            {
              "fixed": "05704335803b69c1bfa8637b7ada942bf2ee8a41"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92494.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix buffer_head leak in ext4_init_orphan_info\n\next4_init_orphan_info() reads orphan file blocks with ext4_bread()\nand stores the returned buffer_head in oi-\u003eof_binfo[i].ob_bh.\n\nIf ext4_bread() succeeds but the orphan block magic or checksum\nvalidation fails, the function jumps to out_free. However, the old\nout_free loop starts releasing buffers from i - 1, so the current\nbuffer_head at index i is skipped.\n\nThis leaks the buffer_head reference obtained by ext4_bread() on the\nbad magic and bad checksum error paths.\n\nFix this by tracking the number of successfully read buffer_heads and\nreleasing exactly those buffer_heads on the error path.",
  "id": "CVE-2026-92494",
  "modified": "2026-09-19T03:30:57.379861948Z",
  "published": "2026-09-17T16:10:10.073Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92494.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92494"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ext4: fix buffer_head leak in ext4_init_orphan_info"
}