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CVE-2026-80768

Estado: RecibidaSin puntuar—

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

HID: ft260: fix stack-use-after-return write in I2C read race

ft260_i2c_read() points dev->read_buf at a caller-supplied buffer (often an on-stack variable), arms a completion and waits up to five seconds for the device to return the data. The HID input callback ft260_raw_event() runs in the input/IRQ path, independent of the dev->lock mutex held by the read path, and copies the device-supplied payload into dev->read_buf after a plain NULL check.

These two paths share read_buf, read_idx and read_len with no serialization. If the device delays its response until the read times out, ft260_i2c_read() resets the controller, clears read_buf and returns, unwinding the stack frame the buffer lived in. A response that arrives at that moment lets ft260_raw_event() pass the NULL check and then memcpy() the device-controlled payload into the now-freed stack location, a bounded but attacker-influenced stack-use-after-return write triggerable by malicious or malfunctioning hardware.

Leer descripción completaMostrar menos

Add a dedicated spinlock that serializes every access to read_buf, read_idx and read_len. ft260_raw_event() now holds it across the NULL check, the memcpy and the index update, while the read path takes it when arming and when clearing the buffer, so the teardown can no longer slip between the check and the copy.

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-2026-80768",
  "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": "6a82582d9fa438045191074856f47165334f2777",
              "lessThan": "2b907001e8a83cdb71e899fd3d77ab51e2c03f10",
              "versionType": "git"
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              "versionType": "git"
            },
            {
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          "programFiles": [
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          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "5.13"
            },
            {
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              "version": "0",
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              "version": "5.15.220",
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            },
            {
              "status": "unaffected",
              "version": "6.1.187",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.156",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "6.18.49",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/hid/hid-ft260.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-04T16:18:02.227",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2b907001e8a83cdb71e899fd3d77ab51e2c03f10",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: ft260: fix stack-use-after-return write in I2C read race\n\nft260_i2c_read() points dev->read_buf at a caller-supplied buffer\n(often an on-stack variable), arms a completion and waits up to five\nseconds for the device to return the data. The HID input callback\nft260_raw_event() runs in the input/IRQ path, independent of the\ndev->lock mutex held by the read path, and copies the device-supplied\npayload into dev->read_buf after a plain NULL check.\n\nThese two paths share read_buf, read_idx and read_len with no\nserialization. If the device delays its response until the read\ntimes out, ft260_i2c_read() resets the controller, clears read_buf\nand returns, unwinding the stack frame the buffer lived in. A\nresponse that arrives at that moment lets ft260_raw_event() pass the\nNULL check and then memcpy() the device-controlled payload into the\nnow-freed stack location, a bounded but attacker-influenced\nstack-use-after-return write triggerable by malicious or\nmalfunctioning hardware.\n\nAdd a dedicated spinlock that serializes every access to read_buf,\nread_idx and read_len. ft260_raw_event() now holds it across the\nNULL check, the memcpy and the index update, while the read path\ntakes it when arming and when clearing the buffer, so the teardown\ncan no longer slip between the check and the copy."
    }
  ],
  "lastModified": "2026-09-04T16:18:02.227",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}