ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup}

{
  "id": "4bb4d002b6d8afb684be13b0de0fcbcd9b571d7759efa65b007b776f5b771c3b",
  "url": "https://osv.dev/vulnerability/CVE-2023-53662",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup}",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup} If the filename casefolding fails, we'll be leaking memory from the fscrypt_name struct, namely from the 'crypto_buf.name' member. Make sure we free it in the error path on both ext4_fname_setup_filename() and ext4_fname_prepare_lookup() functions.",
    "evidence": "osv:CVE-2023-53662",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.199",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.54",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.5.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-53662",
      "aliases": [
        "CVE-2023-53662"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1ae98e295fa2577fb5e492200c58d10230e00e99"
                },
                {
                  "fixed": "98fc9c2cc45cfcb56961a73de3ec69b474063fc0"
                },
                {
                  "fixed": "1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c"
                },
                {
                  "fixed": "36daf050be3f6f067631dc52054de2d3b7cc849f"
                },
                {
                  "fixed": "7ca4b085f430f3774c3838b3da569ceccd6a0177"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53662.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.13.0"
                },
                {
                  "fixed": "5.15.199"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.54"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.5.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53662.json"
          }
        }
      ],
      "modified": "2026-10-30T02:30:35.492762675Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c",
        "https://git.kernel.org/stable/c/36daf050be3f6f067631dc52054de2d3b7cc849f",
        "https://git.kernel.org/stable/c/7ca4b085f430f3774c3838b3da569ceccd6a0177",
        "https://git.kernel.org/stable/c/98fc9c2cc45cfcb56961a73de3ec69b474063fc0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53662.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53662",
        "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/2023/53xxx/CVE-2023-53662.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53662",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 513536,
  "published_at": "2025-10-07T15:21:21.703+00:00"
}