CVE-2026-64040 (GCVE-0-2026-64040)
Vulnerability from cvelistv5
Published
2026-07-19 15:39
Modified
2026-10-15 10:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix error return when vfs_mkdir() fails When vfs_mkdir() fails, the error code is not extracted from the returned error pointer. This causes mkdir_error to be reached with ret=0, which leads to returning ERR_PTR(0) (NULL) instead of a proper error pointer. Fix this by extracting the error code from the error pointer when vfs_mkdir() fails.
References
Impacted products
Vendor Product Version
Linux Linux Version: 406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed
Version: 406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed
Version: 406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cachefiles/namei.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "86f4c1586418d50203ee8d76cba5d7b148719a32",
              "status": "affected",
              "version": "406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed",
              "versionType": "git"
            },
            {
              "lessThan": "0940108d27c6995e02819ff832be11892f0b208b",
              "status": "affected",
              "version": "406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed",
              "versionType": "git"
            },
            {
              "lessThan": "8a220d1c312c66194f4a33dd52d1fba42bc2b341",
              "status": "affected",
              "version": "406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/cachefiles/namei.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.57",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: Fix error return when vfs_mkdir() fails\n\nWhen vfs_mkdir() fails, the error code is not extracted from the\nreturned error pointer. This causes mkdir_error to be reached with\nret=0, which leads to returning ERR_PTR(0) (NULL) instead of a\nproper error pointer.\n\nFix this by extracting the error code from the error pointer when\nvfs_mkdir() fails."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-15T10:07:58.219Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/86f4c1586418d50203ee8d76cba5d7b148719a32"
        },
        {
          "url": "https://git.kernel.org/stable/c/0940108d27c6995e02819ff832be11892f0b208b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a220d1c312c66194f4a33dd52d1fba42bc2b341"
        }
      ],
      "title": "cachefiles: Fix error return when vfs_mkdir() fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64040",
    "datePublished": "2026-07-19T15:39:27.348Z",
    "dateReserved": "2026-07-19T07:54:57.029Z",
    "dateUpdated": "2026-10-15T10:07:58.219Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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