{"id":"CVE-2026-23452","state":"PUBLISHED","title":"PM: runtime: Fix a race condition related to device removal","description":"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","publishedAt":"2026-04-03T15:15:34.680Z","updatedAt":"2026-10-15T01:15:13.091Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"20f6e2e22a9c6234113812d5f300d3e952a82721","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"b6dd1a562ca8ba96c8ecb247c62b73f9fa02d47e","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"5649b46af8b167259e8a8e4e7eb3667ce74554b5","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"39f2d86f2ddde8d1beda05732f30c7cd945e0b5a","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"c6febaacfb8a0aec7d771a0e6c21cd68102d5679","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"bb081fd37f8312651140d7429557258afe51693d","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"cf65a77c0f9531eb6cfb97cc040974d2d8fff043","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"29ab768277617452d88c0607c9299cdc63b6e9ff","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/power/runtime.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.32","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.32","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.167","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.78","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.20","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/power/runtime.c"]}],"references":["https://git.kernel.org/stable/c/20f6e2e22a9c6234113812d5f300d3e952a82721","https://git.kernel.org/stable/c/b6dd1a562ca8ba96c8ecb247c62b73f9fa02d47e","https://git.kernel.org/stable/c/5649b46af8b167259e8a8e4e7eb3667ce74554b5","https://git.kernel.org/stable/c/39f2d86f2ddde8d1beda05732f30c7cd945e0b5a","https://git.kernel.org/stable/c/c6febaacfb8a0aec7d771a0e6c21cd68102d5679","https://git.kernel.org/stable/c/bb081fd37f8312651140d7429557258afe51693d","https://git.kernel.org/stable/c/cf65a77c0f9531eb6cfb97cc040974d2d8fff043","https://git.kernel.org/stable/c/29ab768277617452d88c0607c9299cdc63b6e9ff","https://cert-portal.siemens.com/productcert/html/ssa-082556.html","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23452.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23452","state":"PUBLISHED","datePublished":"2026-04-03T15:15:34.680Z","dateUpdated":"2026-10-15T01:15:13.091Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:46.020Z"},"containers":{"cna":{"title":"PM: runtime: Fix a race condition related to device removal","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->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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"20f6e2e22a9c6234113812d5f300d3e952a82721","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"b6dd1a562ca8ba96c8ecb247c62b73f9fa02d47e","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"5649b46af8b167259e8a8e4e7eb3667ce74554b5","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"39f2d86f2ddde8d1beda05732f30c7cd945e0b5a","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"c6febaacfb8a0aec7d771a0e6c21cd68102d5679","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"bb081fd37f8312651140d7429557258afe51693d","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"cf65a77c0f9531eb6cfb97cc040974d2d8fff043","versionType":"git"},{"version":"5e928f77a09a07f9dd595bb8a489965d69a83458","status":"affected","lessThan":"29ab768277617452d88c0607c9299cdc63b6e9ff","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/power/runtime.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.32","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.32","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.167","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.78","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.20","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/power/runtime.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:07:15.926Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-10-15T01:15:13.091Z"},"x_adpType":"supplier"}]}}}