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CVE-2026-93263

Estado: RecibidaSin puntuar—

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

clk: eswin: Zero-initialize stack-allocated clk_init_data

eswin_clk_register_pll() and eswin_register_clkdiv() declare a struct clk_init_data on the stack and only initialize some of its fields (parent_data respectively parent_hws). clk_core_populate_parent_map() checks parent_names first and parent_data second before falling back to parent_hws, so leftover stack garbage in the uninitialized fields hijacks parent resolution and the clk core dereferences a bogus pointer:

Observed on EIC7700 hardware (with the driver backported to a 6.17 tree); whether the bug triggers depends entirely on what the stack happens to contain when the registration helpers run.

Leer descripción completaMostrar menos

Zero-initialize both structures.

Detalles técnicos trazas, registros y código del informe original
  Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c
  Oops [#1]
  epc : __clk_register+0x31a/0x7f0
  [<ffffffff805dc774>] __clk_register+0x31a/0x7f0
  [<ffffffff805dcd76>] devm_clk_hw_register+0x2a/0x94
  [<ffffffff805e319a>] eswin_register_clkdiv+0x80/0xd0
  [<ffffffff805e34a0>] eswin_clk_register_clks+0x162/0x1a0
  [<ffffffff805e3736>] eic7700_clk_probe+0x146/0x180
  [<ffffffff8065d23c>] platform_probe+0x3c/0x7a

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-2026-93263",
  "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": "cd44f127c1d42833a32ba0a0965255ee6184f8c1",
              "lessThan": "1183dc2450a268a536a15da8b106ec520cdbd19f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cd44f127c1d42833a32ba0a0965255ee6184f8c1",
              "lessThan": "011d8de504bc84402aabc1dda1cf0552fe9a5af2",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/clk/eswin/clk.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "7.1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/clk/eswin/clk.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-24T16:17:23.067",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: eswin: Zero-initialize stack-allocated clk_init_data\n\neswin_clk_register_pll() and eswin_register_clkdiv() declare a struct\nclk_init_data on the stack and only initialize some of its fields\n(parent_data respectively parent_hws). clk_core_populate_parent_map()\nchecks parent_names first and parent_data second before falling back\nto parent_hws, so leftover stack garbage in the uninitialized fields\nhijacks parent resolution and the clk core dereferences a bogus\npointer:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c\n  Oops [#1]\n  epc : __clk_register+0x31a/0x7f0\n  [<ffffffff805dc774>] __clk_register+0x31a/0x7f0\n  [<ffffffff805dcd76>] devm_clk_hw_register+0x2a/0x94\n  [<ffffffff805e319a>] eswin_register_clkdiv+0x80/0xd0\n  [<ffffffff805e34a0>] eswin_clk_register_clks+0x162/0x1a0\n  [<ffffffff805e3736>] eic7700_clk_probe+0x146/0x180\n  [<ffffffff8065d23c>] platform_probe+0x3c/0x7a\n\nObserved on EIC7700 hardware (with the driver backported to a 6.17\ntree); whether the bug triggers depends entirely on what the stack\nhappens to contain when the registration helpers run.\n\nZero-initialize both structures."
    }
  ],
  "lastModified": "2026-09-24T16:17:23.067",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}