CVE-2026-93811

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling

Detalles técnicos trazas, registros y código del informe original

1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data
   which only freed n.data, skipping kfree(acl.sd_buf) and leaking
   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error
   labels to out_free to release acl.sd_buf on all error paths.

2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code
   returned success without freeing sd_buf and left stale *pntsd.
   Set rc = -EINVAL before jumping to out_free to return error code and
   free buffer.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-93811",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "cb69d4d6f709f87c94afa28ae64c501576692171",
              "lessThan": "f46a70a082bdbfecbe074af8a719c26c4deb58c6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8f0541186e9ad1b62accc9519cc2b7a7240272a7",
              "lessThan": "86c2625fb9863139b359805fc6be1e31edbd3d65",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "edc17db83085624a2b1bacf6a4521d7f15571737",
              "versionType": "git"
            },
            {
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              "lessThan": "c3836f55e0dab96314774215e12d87f63fa919f2",
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            {
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              "versionType": "git"
            },
            {
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              "lessThan": "d708a36634bb7b6f94d0e76d587d2ec50b2b93b5",
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            {
              "status": "affected",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8e33102309bd6839b2e2e158f93a7b378cb4655d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.62",
              "lessThan": "5.15.222",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.18.18",
              "lessThan": "5.19",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.19.2",
              "lessThan": "5.20",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/smb/server/vfs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/server/vfs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-24T17:17:14.550",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling\n\n1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data\n   which only freed n.data, skipping kfree(acl.sd_buf) and leaking\n   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error\n   labels to out_free to release acl.sd_buf on all error paths.\n\n2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code\n   returned success without freeing sd_buf and left stale *pntsd.\n   Set rc = -EINVAL before jumping to out_free to return error code and\n   free buffer."
    }
  ],
  "lastModified": "2026-10-03T11:17:50.870",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}