{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64103",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-64103"
  ],
  "published": "2026-07-19T15:41:06Z",
  "summary": "scsi: isci: Fix use-after-free in device removal path",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: isci: Fix use-after-free in device removal path\n\nThe ISCI completion tasklet is initialized in isci_host_alloc()\n(drivers/scsi/isci/init.c:496) and scheduled from both MSI-X and legacy\ninterrupt handlers (drivers/scsi/isci/host.c:223,613).\n\nisci_host_deinit() stops the controller and waits for stop completion,\nbut it never kills completion_tasklet before teardown continues. A\ntop-of-function tasklet_kill() is not sufficient here: interrupts are\nonly disabled when isci_host_stop_complete() runs, so until\nwait_for_stop() returns the IRQ handlers can still requeue the\ntasklet. The tasklet callback also re-enables interrupts after draining\ncompletions, so killing the tasklet before the source is quiesced leaves\nthe same race open.\n\nOnce wait_for_stop() returns, no further IRQ-driven scheduling can\noccur. Kill completion_tasklet there so teardown cannot race a queued\ntasklet running on a dead ihost. On remove or unload, the stale callback\ncan otherwise dereference ihost and touch ihost->smu_registers after the\nhost lifetime ends.\n\nA UML + KASAN analogue reproduced the failure class both with no\ntasklet_kill() and with tasklet_kill() placed before source quiesce, and\nstayed clean once the kill happened after quiescing the scheduling\nsource.\n\nThis mirrors commit f6ab594672d4 (\"scsi: aic94xx: fix use-after-free in\ndevice removal path\"), but ISCI needs the kill after wait_for_stop().",
  "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": "6.1.175",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64103"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1412995e10c74644b47f242aea6e4f3d4180e806"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a83d3e4daba40d49324cec1c51ed261e1ea48cf1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ab2266601a875982f2d2033f41e070a6d5e615e2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/309c6058622d080fe8c2fab87c30da82d834d989"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cb9e72c50e6c81a5903f27e0b397ce8525d7539b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b9ff8631006233ba246828ac70409d2cb2da38d3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b52a8d52c3125ec9a93106ed816582368de34426"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-07-19T15:41:06Z"
  }
}