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CVE-2026-89794

Estado: RecibidaSin puntuar—

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

ksmbd: zero pipe read compound padding

Compound response handling extends the last response iov to an eight-byte boundary.

smb2_read_pipe() allocates only the payload size, so the alignment padding can expose up to seven bytes of uninitialized kernel heap memory.

Allocate the aligned size and clear the unused tail before pinning the response 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)

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 KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-89794",
  "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": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "lessThan": "f188a400dd5285fec5a84548fe8dca49eee01155",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "lessThan": "d83a9de7cecd401c3d3e00ed6371194dcd7313e4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "lessThan": "be15b8da4a82cf1e1f9880b2661b90770606eec1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "lessThan": "73f860489e3be2245598d1819226304fc5b87291",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f2283680a80571ca82d710bc6ecd8f8beac67d63",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.145",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.71",
              "lessThan": "6.2",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.6",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-16T11:16:44.197",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/73f860489e3be2245598d1819226304fc5b87291",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/be15b8da4a82cf1e1f9880b2661b90770606eec1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d83a9de7cecd401c3d3e00ed6371194dcd7313e4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f188a400dd5285fec5a84548fe8dca49eee01155",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: zero pipe read compound padding\n\nCompound response handling extends the last response iov to an eight-byte\nboundary.\n\nsmb2_read_pipe() allocates only the payload size, so the alignment padding\ncan expose up to seven bytes of uninitialized kernel heap memory.\n\nAllocate the aligned size and clear the unused tail before pinning the\nresponse buffer."
    }
  ],
  "lastModified": "2026-09-16T11:16:44.197",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}