{"cve":"CVE-2024-26605","nvd":{"published":"2024-02-26T16:28:00.207","modified":"2026-06-17T07:17:52.657","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/0f7908a016c092cfdaa16d785fa5099d867bc1a3","https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20","https://git.kernel.org/stable/c/b0f4478838be1f1d330061201898fef65bf8fd7c","https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70","https://git.kernel.org/stable/c/0f7908a016c092cfdaa16d785fa5099d867bc1a3"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2024-26605","score":0.00208,"percentile":0.10898,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}