CVE-2026-23452 (GCVE-0-2026-23452)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-04-18 08:59
VLAI?
Title
PM: runtime: Fix a race condition related to device removal
Summary
In the Linux kernel, the following vulnerability has been resolved: PM: runtime: Fix a race condition related to device removal The following code in pm_runtime_work() may dereference the dev->parent pointer after the parent device has been freed: /* Maybe the parent is now able to suspend. */ if (parent && !parent->power.ignore_children) { spin_unlock(&dev->power.lock); spin_lock(&parent->power.lock); rpm_idle(parent, RPM_ASYNC); spin_unlock(&parent->power.lock); spin_lock(&dev->power.lock); } Fix this by inserting a flush_work() call in pm_runtime_remove(). Without this patch blktest block/001 triggers the following complaint sporadically: BUG: KASAN: slab-use-after-free in lock_acquire+0x70/0x160 Read of size 1 at addr ffff88812bef7198 by task kworker/u553:1/3081 Workqueue: pm pm_runtime_work Call Trace: <TASK> dump_stack_lvl+0x61/0x80 print_address_description.constprop.0+0x8b/0x310 print_report+0xfd/0x1d7 kasan_report+0xd8/0x1d0 __kasan_check_byte+0x42/0x60 lock_acquire.part.0+0x38/0x230 lock_acquire+0x70/0x160 _raw_spin_lock+0x36/0x50 rpm_suspend+0xc6a/0xfe0 rpm_idle+0x578/0x770 pm_runtime_work+0xee/0x120 process_one_work+0xde3/0x1410 worker_thread+0x5eb/0xfe0 kthread+0x37b/0x480 ret_from_fork+0x6cb/0x920 ret_from_fork_asm+0x11/0x20 </TASK> Allocated by task 4314: kasan_save_stack+0x2a/0x50 kasan_save_track+0x18/0x40 kasan_save_alloc_info+0x3d/0x50 __kasan_kmalloc+0xa0/0xb0 __kmalloc_noprof+0x311/0x990 scsi_alloc_target+0x122/0xb60 [scsi_mod] __scsi_scan_target+0x101/0x460 [scsi_mod] scsi_scan_channel+0x179/0x1c0 [scsi_mod] scsi_scan_host_selected+0x259/0x2d0 [scsi_mod] store_scan+0x2d2/0x390 [scsi_mod] dev_attr_store+0x43/0x80 sysfs_kf_write+0xde/0x140 kernfs_fop_write_iter+0x3ef/0x670 vfs_write+0x506/0x1470 ksys_write+0xfd/0x230 __x64_sys_write+0x76/0xc0 x64_sys_call+0x213/0x1810 do_syscall_64+0xee/0xfc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 Freed by task 4314: kasan_save_stack+0x2a/0x50 kasan_save_track+0x18/0x40 kasan_save_free_info+0x3f/0x50 __kasan_slab_free+0x67/0x80 kfree+0x225/0x6c0 scsi_target_dev_release+0x3d/0x60 [scsi_mod] device_release+0xa3/0x220 kobject_cleanup+0x105/0x3a0 kobject_put+0x72/0xd0 put_device+0x17/0x20 scsi_device_dev_release+0xacf/0x12c0 [scsi_mod] device_release+0xa3/0x220 kobject_cleanup+0x105/0x3a0 kobject_put+0x72/0xd0 put_device+0x17/0x20 scsi_device_put+0x7f/0xc0 [scsi_mod] sdev_store_delete+0xa5/0x120 [scsi_mod] dev_attr_store+0x43/0x80 sysfs_kf_write+0xde/0x140 kernfs_fop_write_iter+0x3ef/0x670 vfs_write+0x506/0x1470 ksys_write+0xfd/0x230 __x64_sys_write+0x76/0xc0 x64_sys_call+0x213/0x1810
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < 20f6e2e22a9c6234113812d5f300d3e952a82721 (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < b6dd1a562ca8ba96c8ecb247c62b73f9fa02d47e (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < 5649b46af8b167259e8a8e4e7eb3667ce74554b5 (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < 39f2d86f2ddde8d1beda05732f30c7cd945e0b5a (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < c6febaacfb8a0aec7d771a0e6c21cd68102d5679 (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < bb081fd37f8312651140d7429557258afe51693d (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < cf65a77c0f9531eb6cfb97cc040974d2d8fff043 (git)
Affected: 5e928f77a09a07f9dd595bb8a489965d69a83458 , < 29ab768277617452d88c0607c9299cdc63b6e9ff (git)
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    Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/base/power/runtime.c"
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              "status": "unaffected",
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
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              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "2.6.32",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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-\u003eparent\npointer after the parent device has been freed:\n\n\t/* Maybe the parent is now able to suspend. */\n\tif (parent \u0026\u0026 !parent-\u003epower.ignore_children) {\n\t\tspin_unlock(\u0026dev-\u003epower.lock);\n\n\t\tspin_lock(\u0026parent-\u003epower.lock);\n\t\trpm_idle(parent, RPM_ASYNC);\n\t\tspin_unlock(\u0026parent-\u003epower.lock);\n\n\t\tspin_lock(\u0026dev-\u003epower.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 \u003cTASK\u003e\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 \u003c/TASK\u003e\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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-18T08:59:00.873Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/20f6e2e22a9c6234113812d5f300d3e952a82721"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6dd1a562ca8ba96c8ecb247c62b73f9fa02d47e"
        },
        {
          "url": "https://git.kernel.org/stable/c/5649b46af8b167259e8a8e4e7eb3667ce74554b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/39f2d86f2ddde8d1beda05732f30c7cd945e0b5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6febaacfb8a0aec7d771a0e6c21cd68102d5679"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb081fd37f8312651140d7429557258afe51693d"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf65a77c0f9531eb6cfb97cc040974d2d8fff043"
        },
        {
          "url": "https://git.kernel.org/stable/c/29ab768277617452d88c0607c9299cdc63b6e9ff"
        }
      ],
      "title": "PM: runtime: Fix a race condition related to device removal",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23452",
    "datePublished": "2026-04-03T15:15:34.680Z",
    "dateReserved": "2026-01-13T15:37:46.020Z",
    "dateUpdated": "2026-04-18T08:59:00.873Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23452",
      "date": "2026-05-08",
      "epss": "0.00035",
      "percentile": "0.10326"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23452\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-03T16:16:31.617\",\"lastModified\":\"2026-04-18T09:16:27.643\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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-\u003eparent\\npointer after the parent device has been freed:\\n\\n\\t/* Maybe the parent is now able to suspend. */\\n\\tif (parent \u0026\u0026 !parent-\u003epower.ignore_children) {\\n\\t\\tspin_unlock(\u0026dev-\u003epower.lock);\\n\\n\\t\\tspin_lock(\u0026parent-\u003epower.lock);\\n\\t\\trpm_idle(parent, RPM_ASYNC);\\n\\t\\tspin_unlock(\u0026parent-\u003epower.lock);\\n\\n\\t\\tspin_lock(\u0026dev-\u003epower.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 \u003cTASK\u003e\\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 \u003c/TASK\u003e\\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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20f6e2e22a9c6234113812d5f300d3e952a82721\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/29ab768277617452d88c0607c9299cdc63b6e9ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/39f2d86f2ddde8d1beda05732f30c7cd945e0b5a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5649b46af8b167259e8a8e4e7eb3667ce74554b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6dd1a562ca8ba96c8ecb247c62b73f9fa02d47e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bb081fd37f8312651140d7429557258afe51693d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6febaacfb8a0aec7d771a0e6c21cd68102d5679\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf65a77c0f9531eb6cfb97cc040974d2d8fff043\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.