{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6f231dda68080759f1aed3769896e94c73099f0f"
            },
            {
              "fixed": "1412995e10c74644b47f242aea6e4f3d4180e806"
            },
            {
              "fixed": "a83d3e4daba40d49324cec1c51ed261e1ea48cf1"
            },
            {
              "fixed": "ab2266601a875982f2d2033f41e070a6d5e615e2"
            },
            {
              "fixed": "309c6058622d080fe8c2fab87c30da82d834d989"
            },
            {
              "fixed": "cb9e72c50e6c81a5903f27e0b397ce8525d7539b"
            },
            {
              "fixed": "b9ff8631006233ba246828ac70409d2cb2da38d3"
            },
            {
              "fixed": "6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c"
            },
            {
              "fixed": "b52a8d52c3125ec9a93106ed816582368de34426"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64103.json"
  },
  "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-\u003esmu_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().",
  "id": "CVE-2026-64103",
  "modified": "2026-07-21T03:41:46.591170868Z",
  "published": "2026-07-19T15:40:07.372Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1412995e10c74644b47f242aea6e4f3d4180e806"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/309c6058622d080fe8c2fab87c30da82d834d989"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a83d3e4daba40d49324cec1c51ed261e1ea48cf1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab2266601a875982f2d2033f41e070a6d5e615e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b52a8d52c3125ec9a93106ed816582368de34426"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9ff8631006233ba246828ac70409d2cb2da38d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb9e72c50e6c81a5903f27e0b397ce8525d7539b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64103.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64103"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "scsi: isci: Fix use-after-free in device removal path"
}