{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89864",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-89864"
  ],
  "published": "2026-09-16T10:32:03Z",
  "summary": "scsi: qla2xxx: Bound i2c->length in I2C bsg handlers",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Bound i2c->length in I2C bsg handlers\n\nstruct qla_i2c_access carries a 16-bit length field alongside a fixed\n64-byte buffer:\n\n\tstruct qla_i2c_access {\n\t\tuint16_t device, offset, option, length;\n\t\tuint8_t  buffer[0x40];\n\t} __packed;\n\nqla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied\ni2c->length without any bounds check. i2c is overlaid on a 256-byte\non-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to\n65535 overruns both:\n\n  - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and\n    over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs\n    i2c->length bytes out of the 256-byte buffer.\n  - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp,\n    then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte\n    buffer inside the on-stack array.\n\nA caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the\nkernel stack. Reject requests whose length exceeds the buffer before any\ncopy or DMA transfer in both handlers.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89864"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-16T10:32:03Z"
  }
}