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CVE-2026-89843

Estado: RecibidaSin puntuar—

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

scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak

Several bsg handlers stage their request/reply in an uninitialized 256-byte on-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via sg_copy_to_buffer(), which only copies as many bytes as the user-supplied request payload. When the request is shorter than the structure, the remainder of the buffer is left holding stale stack data.

qla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full structure back to the reply payload with sg_copy_from_buffer(), leaking the uninitialized stack bytes to user space. The write/update paths do not copy the buffer back, but can feed uninitialized fields to the device.

Leer descripción completaMostrar menos

Zero the stack buffer at declaration in all five handlers, mirroring the heap kzalloc() approach, so short requests can no longer expose stale memory.

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)

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{
  "id": "CVE-2026-89843",
  "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": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "1c820d0900e4aacd5020b989159f6b4b2f7d0d6a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "26bc6a2c235a70bfc9b6de412600208aca820e20",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "5ab32dff910291b5e6bf6223f8a4003536c1800a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "947c6bfcf7f5ec924995bec43e3108b98c75b44e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "4fe5790674097897a1af1367d1e384f7e5a62fb7",
              "versionType": "git"
            },
            {
              "status": "affected",
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            {
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              "lessThan": "b93d3bb3afe1b44489927de1eb4e66e8536a5935",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_bsg.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "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-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_bsg.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-16T11:16:51.157",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1c820d0900e4aacd5020b989159f6b4b2f7d0d6a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/26bc6a2c235a70bfc9b6de412600208aca820e20",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4fe5790674097897a1af1367d1e384f7e5a62fb7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5ab32dff910291b5e6bf6223f8a4003536c1800a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7881faf862ee301ecfe3adc0725bd2fa0021cd95",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/947c6bfcf7f5ec924995bec43e3108b98c75b44e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b93d3bb3afe1b44489927de1eb4e66e8536a5935",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak\n\nSeveral bsg handlers stage their request/reply in an uninitialized 256-byte\non-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via\nsg_copy_to_buffer(), which only copies as many bytes as the user-supplied\nrequest payload. When the request is shorter than the structure, the\nremainder of the buffer is left holding stale stack data.\n\nqla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full\nstructure back to the reply payload with sg_copy_from_buffer(), leaking the\nuninitialized stack bytes to user space. The write/update paths do not copy\nthe buffer back, but can feed uninitialized fields to the device.\n\nZero the stack buffer at declaration in all five handlers, mirroring the\nheap kzalloc() approach, so short requests can no longer expose stale\nmemory."
    }
  ],
  "lastModified": "2026-09-16T11:16:51.157",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}