CVE-2026-72205 (GCVE-0-2026-72205)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:54 – Updated: 2026-08-18 06:56
VLAI
Title
ntfs: free volume-wide resources on fill_super failure
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: free volume-wide resources on fill_super failure ntfs_fill_super()'s err_out_now path frees only the volume struct via kfree(vol), leaving several vol-owned allocations behind on every mount failure: - vol->nls_map, loaded by ntfs_init_fs_context() via load_nls_default() (or replaced by an explicit nls= option in ntfs_parse_param()), is never unload_nls()'d. - vol->volume_label, allocated by load_system_files() through ntfs_ucstonls() once the $Volume name attribute has been parsed, is not released by load_system_files()'s own error labels nor by the fill_super() inline cleanup that only runs on d_make_root() failure. Any later failure inside load_system_files() leaks it. - vol->lcn_empty_bits_per_page was kvfree()'d in unl_upcase_iput_tmp_ino_err_out_now without clearing the pointer, so it could not be folded into a single common cleanup. Because the failure paths never call ntfs_volume_free() and never reach the d_make_root() inline cleanup block (it sits above the label and is jumped over by the load_system_files() / kvmalloc failure gotos), these resources accumulate per failed mount attempt with no chance of recovery short of unloading the module. This is a silent leak: the inodes loaded prior to failure remain hashed but generic_shutdown_super() skips evict_inodes() when sb->s_root is unset, so no CHECK_DATA_CORRUPTION warning is emitted either. Move the per-volume frees down to err_out_now and drop the lcn_empty_bits_per_page kvfree() from the upper label so the cleanup is performed exactly once on every failure path. Using unconditional kvfree() / kfree() / unload_nls() is safe because they all accept NULL and the upper labels that previously freed nls_map (the d_make_root() inline cleanup) already clear the pointer.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6251f0b0de7d645e3591931ca4c11d8322c1866f , < aca3d383a23cb7f3a2849c09fda3974f1838d941 (git)
Affected: 6251f0b0de7d645e3591931ca4c11d8322c1866f , < a9523a7d3b24b3a6b25ec1eb668ee6618cacf05e (git)
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Linux Linux Affected: 7.1
Unaffected: 0 , < 7.1 (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs/super.c"
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                },
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: free volume-wide resources on fill_super failure\n\nntfs_fill_super()\u0027s err_out_now path frees only the volume struct via\nkfree(vol), leaving several vol-owned allocations behind on every mount\nfailure:\n\n  - vol-\u003enls_map, loaded by ntfs_init_fs_context() via\n    load_nls_default() (or replaced by an explicit nls= option in\n    ntfs_parse_param()), is never unload_nls()\u0027d.\n\n  - vol-\u003evolume_label, allocated by load_system_files() through\n    ntfs_ucstonls() once the $Volume name attribute has been parsed, is\n    not released by load_system_files()\u0027s own error labels nor by the\n    fill_super() inline cleanup that only runs on d_make_root()\n    failure.  Any later failure inside load_system_files() leaks it.\n\n  - vol-\u003elcn_empty_bits_per_page was kvfree()\u0027d in\n    unl_upcase_iput_tmp_ino_err_out_now without clearing the pointer,\n    so it could not be folded into a single common cleanup.\n\nBecause the failure paths never call ntfs_volume_free() and never reach\nthe d_make_root() inline cleanup block (it sits above the label and is\njumped over by the load_system_files() / kvmalloc failure gotos), these\nresources accumulate per failed mount attempt with no chance of\nrecovery short of unloading the module.  This is a silent leak: the\ninodes loaded prior to failure remain hashed but generic_shutdown_super()\nskips evict_inodes() when sb-\u003es_root is unset, so no CHECK_DATA_CORRUPTION\nwarning is emitted either.\n\nMove the per-volume frees down to err_out_now and drop the\nlcn_empty_bits_per_page kvfree() from the upper label so the cleanup is\nperformed exactly once on every failure path.  Using unconditional\nkvfree() / kfree() / unload_nls() is safe because they all accept NULL\nand the upper labels that previously freed nls_map (the d_make_root()\ninline cleanup) already clear the pointer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T06:56:24.809Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aca3d383a23cb7f3a2849c09fda3974f1838d941"
        },
        {
          "url": "https://git.kernel.org/stable/c/a9523a7d3b24b3a6b25ec1eb668ee6618cacf05e"
        }
      ],
      "title": "ntfs: free volume-wide resources on fill_super failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72205",
    "datePublished": "2026-08-15T05:54:01.803Z",
    "dateReserved": "2026-08-09T03:40:39.912Z",
    "dateUpdated": "2026-08-18T06:56:24.809Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72205",
      "date": "2026-08-24",
      "epss": "0.00198",
      "percentile": "0.09541"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72205\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:21:39.190\",\"lastModified\":\"2026-08-18T07:16:53.877\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nntfs: free volume-wide resources on fill_super failure\\n\\nntfs_fill_super()\u0027s err_out_now path frees only the volume struct via\\nkfree(vol), leaving several vol-owned allocations behind on every mount\\nfailure:\\n\\n  - vol-\u003enls_map, loaded by ntfs_init_fs_context() via\\n    load_nls_default() (or replaced by an explicit nls= option in\\n    ntfs_parse_param()), is never unload_nls()\u0027d.\\n\\n  - vol-\u003evolume_label, allocated by load_system_files() through\\n    ntfs_ucstonls() once the $Volume name attribute has been parsed, is\\n    not released by load_system_files()\u0027s own error labels nor by the\\n    fill_super() inline cleanup that only runs on d_make_root()\\n    failure.  Any later failure inside load_system_files() leaks it.\\n\\n  - vol-\u003elcn_empty_bits_per_page was kvfree()\u0027d in\\n    unl_upcase_iput_tmp_ino_err_out_now without clearing the pointer,\\n    so it could not be folded into a single common cleanup.\\n\\nBecause the failure paths never call ntfs_volume_free() and never reach\\nthe d_make_root() inline cleanup block (it sits above the label and is\\njumped over by the load_system_files() / kvmalloc failure gotos), these\\nresources accumulate per failed mount attempt with no chance of\\nrecovery short of unloading the module.  This is a silent leak: the\\ninodes loaded prior to failure remain hashed but generic_shutdown_super()\\nskips evict_inodes() when sb-\u003es_root is unset, so no CHECK_DATA_CORRUPTION\\nwarning is emitted either.\\n\\nMove the per-volume frees down to err_out_now and drop the\\nlcn_empty_bits_per_page kvfree() from the upper label so the cleanup is\\nperformed exactly once on every failure path.  Using unconditional\\nkvfree() / kfree() / unload_nls() is safe because they all accept NULL\\nand the upper labels that previously freed nls_map (the d_make_root()\\ninline cleanup) already clear the pointer.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ntfs/super.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6251f0b0de7d645e3591931ca4c11d8322c1866f\",\"lessThan\":\"aca3d383a23cb7f3a2849c09fda3974f1838d941\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6251f0b0de7d645e3591931ca4c11d8322c1866f\",\"lessThan\":\"a9523a7d3b24b3a6b25ec1eb668ee6618cacf05e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ntfs/super.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"7.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a9523a7d3b24b3a6b25ec1eb668ee6618cacf05e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aca3d383a23cb7f3a2849c09fda3974f1838d941\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-18T16:28:33+00:00",
      "cve": "CVE-2026-72205",
      "id": "CVE-2026-72205",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ntfs: free volume-wide resources on fill_super failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72205.json",
      "version": "3"
    }
  }
}



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