{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23452",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-23452"
  ],
  "published": "2026-04-03T15:24:34Z",
  "summary": "PM: runtime: Fix a race condition related to device removal",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPM: runtime: Fix a race condition related to device removal\n\nThe following code in pm_runtime_work() may dereference the dev->parent\npointer after the parent device has been freed:\n\n\t/* Maybe the parent is now able to suspend. */\n\tif (parent && !parent->power.ignore_children) {\n\t\tspin_unlock(&dev->power.lock);\n\n\t\tspin_lock(&parent->power.lock);\n\t\trpm_idle(parent, RPM_ASYNC);\n\t\tspin_unlock(&parent->power.lock);\n\n\t\tspin_lock(&dev->power.lock);\n\t}\n\nFix this by inserting a flush_work() call in pm_runtime_remove().\n\nWithout this patch blktest block/001 triggers the following complaint\nsporadically:\n\nBUG: KASAN: slab-use-after-free in lock_acquire+0x70/0x160\nRead of size 1 at addr ffff88812bef7198 by task kworker/u553:1/3081\nWorkqueue: pm pm_runtime_work\nCall Trace:\n <TASK>\n dump_stack_lvl+0x61/0x80\n print_address_description.constprop.0+0x8b/0x310\n print_report+0xfd/0x1d7\n kasan_report+0xd8/0x1d0\n __kasan_check_byte+0x42/0x60\n lock_acquire.part.0+0x38/0x230\n lock_acquire+0x70/0x160\n _raw_spin_lock+0x36/0x50\n rpm_suspend+0xc6a/0xfe0\n rpm_idle+0x578/0x770\n pm_runtime_work+0xee/0x120\n process_one_work+0xde3/0x1410\n worker_thread+0x5eb/0xfe0\n kthread+0x37b/0x480\n ret_from_fork+0x6cb/0x920\n ret_from_fork_asm+0x11/0x20\n </TASK>\n\nAllocated by task 4314:\n kasan_save_stack+0x2a/0x50\n kasan_save_track+0x18/0x40\n kasan_save_alloc_info+0x3d/0x50\n __kasan_kmalloc+0xa0/0xb0\n __kmalloc_noprof+0x311/0x990\n scsi_alloc_target+0x122/0xb60 [scsi_mod]\n __scsi_scan_target+0x101/0x460 [scsi_mod]\n scsi_scan_channel+0x179/0x1c0 [scsi_mod]\n scsi_scan_host_selected+0x259/0x2d0 [scsi_mod]\n store_scan+0x2d2/0x390 [scsi_mod]\n dev_attr_store+0x43/0x80\n sysfs_kf_write+0xde/0x140\n kernfs_fop_write_iter+0x3ef/0x670\n vfs_write+0x506/0x1470\n ksys_write+0xfd/0x230\n __x64_sys_write+0x76/0xc0\n x64_sys_call+0x213/0x1810\n do_syscall_64+0xee/0xfc0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nFreed by task 4314:\n kasan_save_stack+0x2a/0x50\n kasan_save_track+0x18/0x40\n kasan_save_free_info+0x3f/0x50\n __kasan_slab_free+0x67/0x80\n kfree+0x225/0x6c0\n scsi_target_dev_release+0x3d/0x60 [scsi_mod]\n device_release+0xa3/0x220\n kobject_cleanup+0x105/0x3a0\n kobject_put+0x72/0xd0\n put_device+0x17/0x20\n scsi_device_dev_release+0xacf/0x12c0 [scsi_mod]\n device_release+0xa3/0x220\n kobject_cleanup+0x105/0x3a0\n kobject_put+0x72/0xd0\n put_device+0x17/0x20\n scsi_device_put+0x7f/0xc0 [scsi_mod]\n sdev_store_delete+0xa5/0x120 [scsi_mod]\n dev_attr_store+0x43/0x80\n sysfs_kf_write+0xde/0x140\n kernfs_fop_write_iter+0x3ef/0x670\n vfs_write+0x506/0x1470\n ksys_write+0xfd/0x230\n __x64_sys_write+0x76/0xc0\n x64_sys_call+0x213/0x1810",
  "affected": [
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      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.6.62-1+rpt1",
        "1:6.6.74-1+rpt1",
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        "1:6.12.25-1+rpt1",
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