{"id":"CVE-2024-26605","state":"PUBLISHED","title":"PCI/ASPM: Fix deadlock when enabling ASPM","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/ASPM: Fix deadlock when enabling ASPM\n\nA last minute revert in 6.7-final introduced a potential deadlock when\nenabling ASPM during probe of Qualcomm PCIe controllers as reported by\nlockdep:\n\n  ============================================\n  WARNING: possible recursive locking detected\n  6.7.0 #40 Not tainted\n  --------------------------------------------\n  kworker/u16:5/90 is trying to acquire lock:\n  ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pcie_aspm_pm_state_change+0x58/0xdc\n\n              but task is already holding lock:\n  ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pci_walk_bus+0x34/0xbc\n\n              other info that might help us debug this:\n   Possible unsafe locking scenario:\n\n         CPU0\n         ----\n    lock(pci_bus_sem);\n    lock(pci_bus_sem);\n\n               *** DEADLOCK ***\n\n  Call trace:\n   print_deadlock_bug+0x25c/0x348\n   __lock_acquire+0x10a4/0x2064\n   lock_acquire+0x1e8/0x318\n   down_read+0x60/0x184\n   pcie_aspm_pm_state_change+0x58/0xdc\n   pci_set_full_power_state+0xa8/0x114\n   pci_set_power_state+0xc4/0x120\n   qcom_pcie_enable_aspm+0x1c/0x3c [pcie_qcom]\n   pci_walk_bus+0x64/0xbc\n   qcom_pcie_host_post_init_2_7_0+0x28/0x34 [pcie_qcom]\n\nThe deadlock can easily be reproduced on machines like the Lenovo ThinkPad\nX13s by adding a delay to increase the race window during asynchronous\nprobe where another thread can take a write lock.\n\nAdd a new pci_set_power_state_locked() and associated helper functions that\ncan be called with the PCI bus semaphore held to avoid taking the read lock\ntwice.","publishedAt":"2024-02-24T15:17:13.899Z","updatedAt":"2026-05-23T15:35:58.041Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b9c370b61d735a0e5390c42771e7eb21413f7868","status":"affected","lessThan":"0f7908a016c092cfdaa16d785fa5099d867bc1a3","versionType":"git"},{"version":"8cc22ba3f77c59df5f1ac47d62df51efb28cd868","status":"affected","lessThan":"b0f4478838be1f1d330061201898fef65bf8fd7c","versionType":"git"},{"version":"f93e71aea6c60ebff8adbd8941e678302d377869","status":"affected","lessThan":"ef90508574d7af48420bdc5f7b9a4f1cdd26bc70","versionType":"git"},{"version":"f93e71aea6c60ebff8adbd8941e678302d377869","status":"affected","lessThan":"1e560864159d002b453da42bd2c13a1805515a20","versionType":"git"},{"version":"1f2f662c8bec75d1311e063efaa9107435cf16c8","status":"affected","versionType":"git"},{"version":"6.1.72","status":"affected","lessThan":"6.1.88","versionType":"semver"},{"version":"6.6.11","status":"affected","lessThan":"6.6.29","versionType":"semver"},{"version":"5.15.147","status":"affected","lessThan":"5.16","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/bus.c","drivers/pci/controller/dwc/pcie-qcom.c","drivers/pci/pci.c","drivers/pci/pci.h","drivers/pci/pcie/aspm.c","include/linux/pci.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.1.88","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.29","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.5","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/bus.c","drivers/pci/controller/dwc/pcie-qcom.c","drivers/pci/pci.c","drivers/pci/pci.h","drivers/pci/pcie/aspm.c","include/linux/pci.h"]}],"references":["https://git.kernel.org/stable/c/0f7908a016c092cfdaa16d785fa5099d867bc1a3","https://git.kernel.org/stable/c/b0f4478838be1f1d330061201898fef65bf8fd7c","https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70","https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:10.607Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/26xxx/CVE-2024-26605.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-26605","state":"PUBLISHED","datePublished":"2024-02-24T15:17:13.899Z","dateUpdated":"2026-05-23T15:35:58.041Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-19T14:20:24.130Z"},"containers":{"cna":{"title":"PCI/ASPM: Fix deadlock when enabling ASPM","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/ASPM: Fix deadlock when enabling ASPM\n\nA last minute revert in 6.7-final introduced a potential deadlock when\nenabling ASPM during probe of Qualcomm PCIe controllers as reported by\nlockdep:\n\n  ============================================\n  WARNING: possible recursive locking detected\n  6.7.0 #40 Not tainted\n  --------------------------------------------\n  kworker/u16:5/90 is trying to acquire lock:\n  ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pcie_aspm_pm_state_change+0x58/0xdc\n\n              but task is already holding lock:\n  ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pci_walk_bus+0x34/0xbc\n\n              other info that might help us debug this:\n   Possible unsafe locking scenario:\n\n         CPU0\n         ----\n    lock(pci_bus_sem);\n    lock(pci_bus_sem);\n\n               *** DEADLOCK ***\n\n  Call trace:\n   print_deadlock_bug+0x25c/0x348\n   __lock_acquire+0x10a4/0x2064\n   lock_acquire+0x1e8/0x318\n   down_read+0x60/0x184\n   pcie_aspm_pm_state_change+0x58/0xdc\n   pci_set_full_power_state+0xa8/0x114\n   pci_set_power_state+0xc4/0x120\n   qcom_pcie_enable_aspm+0x1c/0x3c [pcie_qcom]\n   pci_walk_bus+0x64/0xbc\n   qcom_pcie_host_post_init_2_7_0+0x28/0x34 [pcie_qcom]\n\nThe deadlock can easily be reproduced on machines like the Lenovo ThinkPad\nX13s by adding a delay to increase the race window during asynchronous\nprobe where another thread can take a write lock.\n\nAdd a new pci_set_power_state_locked() and associated helper functions that\ncan be called with the PCI bus semaphore held to avoid taking the read lock\ntwice."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b9c370b61d735a0e5390c42771e7eb21413f7868","status":"affected","lessThan":"0f7908a016c092cfdaa16d785fa5099d867bc1a3","versionType":"git"},{"version":"8cc22ba3f77c59df5f1ac47d62df51efb28cd868","status":"affected","lessThan":"b0f4478838be1f1d330061201898fef65bf8fd7c","versionType":"git"},{"version":"f93e71aea6c60ebff8adbd8941e678302d377869","status":"affected","lessThan":"ef90508574d7af48420bdc5f7b9a4f1cdd26bc70","versionType":"git"},{"version":"f93e71aea6c60ebff8adbd8941e678302d377869","status":"affected","lessThan":"1e560864159d002b453da42bd2c13a1805515a20","versionType":"git"},{"version":"1f2f662c8bec75d1311e063efaa9107435cf16c8","status":"affected","versionType":"git"},{"version":"6.1.72","status":"affected","lessThan":"6.1.88","versionType":"semver"},{"version":"6.6.11","status":"affected","lessThan":"6.6.29","versionType":"semver"},{"version":"5.15.147","status":"affected","lessThan":"5.16","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/bus.c","drivers/pci/controller/dwc/pcie-qcom.c","drivers/pci/pci.c","drivers/pci/pci.h","drivers/pci/pcie/aspm.c","include/linux/pci.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.1.88","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.29","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.5","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/bus.c","drivers/pci/controller/dwc/pcie-qcom.c","drivers/pci/pci.c","drivers/pci/pci.h","drivers/pci/pcie/aspm.c","include/linux/pci.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/0f7908a016c092cfdaa16d785fa5099d867bc1a3"},{"url":"https://git.kernel.org/stable/c/b0f4478838be1f1d330061201898fef65bf8fd7c"},{"url":"https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70"},{"url":"https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:35:58.041Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.72","versionEndExcluding":"6.1.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.11","versionEndExcluding":"6.6.29"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.7.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.147"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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