CVE-2025-38172 (GCVE-0-2025-38172)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:36 – Updated: 2025-07-28 04:14
VLAI?
Title
erofs: avoid using multiple devices with different type
Summary
In the Linux kernel, the following vulnerability has been resolved: erofs: avoid using multiple devices with different type For multiple devices, both primary and extra devices should be the same type. `erofs_init_device` has already guaranteed that if the primary is a file-backed device, extra devices should also be regular files. However, if the primary is a block device while the extra device is a file-backed device, `erofs_init_device` will get an ENOTBLK, which is not treated as an error in `erofs_fc_get_tree`, and that leads to an UAF: erofs_fc_get_tree get_tree_bdev_flags(erofs_fc_fill_super) erofs_read_superblock erofs_init_device // sbi->dif0 is not inited yet, // return -ENOTBLK deactivate_locked_super free(sbi) if (err is -ENOTBLK) sbi->dif0.file = filp_open() // sbi UAF So if -ENOTBLK is hitted in `erofs_init_device`, it means the primary device must be a block device, and the extra device is not a block device. The error can be converted to -EINVAL.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fb176750266a3d7f42ebdcf28e8ba40350b27847 , < 65115472f741ca000d7ea4a5922214f93cd1516e (git)
Affected: fb176750266a3d7f42ebdcf28e8ba40350b27847 , < cd04beb9ce2773a16057248bb4fa424068ae3807 (git)
Affected: fb176750266a3d7f42ebdcf28e8ba40350b27847 , < 9748f2f54f66743ac77275c34886a9f890e18409 (git)
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    Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "65115472f741ca000d7ea4a5922214f93cd1516e",
              "status": "affected",
              "version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
              "versionType": "git"
            },
            {
              "lessThan": "cd04beb9ce2773a16057248bb4fa424068ae3807",
              "status": "affected",
              "version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
              "versionType": "git"
            },
            {
              "lessThan": "9748f2f54f66743ac77275c34886a9f890e18409",
              "status": "affected",
              "version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.34",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.3",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: avoid using multiple devices with different type\n\nFor multiple devices, both primary and extra devices should be the\nsame type. `erofs_init_device` has already guaranteed that if the\nprimary is a file-backed device, extra devices should also be\nregular files.\n\nHowever, if the primary is a block device while the extra device\nis a file-backed device, `erofs_init_device` will get an ENOTBLK,\nwhich is not treated as an error in `erofs_fc_get_tree`, and that\nleads to an UAF:\n\n  erofs_fc_get_tree\n    get_tree_bdev_flags(erofs_fc_fill_super)\n      erofs_read_superblock\n        erofs_init_device  // sbi-\u003edif0 is not inited yet,\n                           // return -ENOTBLK\n      deactivate_locked_super\n        free(sbi)\n    if (err is -ENOTBLK)\n      sbi-\u003edif0.file = filp_open()  // sbi UAF\n\nSo if -ENOTBLK is hitted in `erofs_init_device`, it means the\nprimary device must be a block device, and the extra device\nis not a block device. The error can be converted to -EINVAL."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:14:13.860Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/65115472f741ca000d7ea4a5922214f93cd1516e"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd04beb9ce2773a16057248bb4fa424068ae3807"
        },
        {
          "url": "https://git.kernel.org/stable/c/9748f2f54f66743ac77275c34886a9f890e18409"
        }
      ],
      "title": "erofs: avoid using multiple devices with different type",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38172",
    "datePublished": "2025-07-03T08:36:10.334Z",
    "dateReserved": "2025-04-16T04:51:23.991Z",
    "dateUpdated": "2025-07-28T04:14:13.860Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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