CVE-2026-93812 (GCVE-0-2026-93812)
Vulnerability from cvelistv5
Published
2026-09-24 16:02
Modified
2026-10-03 10:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr ndr_encode_v4_ntacl() allocates sd_ndr.data via kzalloc() at entry. If any subsequent ndr_write_*() call returns error during encoding, the allocated sd_ndr.data won't be freed and causes memory leak. Move kfree(sd_ndr.data) into out label to ensure the buffer gets released on all success and error return paths.
References
Impacted products
Vendor Product Version
Linux Linux Version: 303fff2b8c77a85c62dbde3b27c24b084144c04c
Version: 303fff2b8c77a85c62dbde3b27c24b084144c04c
Version: 303fff2b8c77a85c62dbde3b27c24b084144c04c
Version: 303fff2b8c77a85c62dbde3b27c24b084144c04c
Version: 303fff2b8c77a85c62dbde3b27c24b084144c04c
Version: 303fff2b8c77a85c62dbde3b27c24b084144c04c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/vfs.c"
          ],
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.15"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.2",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr\n\nndr_encode_v4_ntacl() allocates sd_ndr.data via kzalloc() at entry.\nIf any subsequent ndr_write_*() call returns error during encoding,\nthe allocated sd_ndr.data won\u0027t be freed and causes memory leak.\n\nMove kfree(sd_ndr.data) into out label to ensure the buffer gets\nreleased on all success and error return paths."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:57:44.701Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/306d6f370da7e0e5532dc51c972f4ce101e42431"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc55270e410ccb4d24e637c13b5c4c25bcd106d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/c866c3314a6853eb06c7a8bef67f43c8a8bdfb6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b4dec75498fd0a1c9eaea680aef59c9519eb16f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c521dd78e036b5e0cfd394dd2ff2218890dd9e41"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4d56b00c7df88cd5751e7415bdfabc9fdbc82a7"
        }
      ],
      "title": "ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93812",
    "datePublished": "2026-09-24T16:02:49.060Z",
    "dateReserved": "2026-09-18T17:59:28.790Z",
    "dateUpdated": "2026-10-03T10:57:44.701Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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