CVE-2024-26605

Advisory lineage Upstream: 0 Downstream: 6
Modified
Published: 24 Feb 2024, 15:17
Last modified:23 May 2026, 15:35

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Feb 2024, 15:17
Published
Vulnerability first disclosed
23 May 2026, 15:35
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Fix deadlock when enabling ASPM A last minute revert in 6.7-final introduced a potential deadlock when enabling ASPM during probe of Qualcomm PCIe controllers as reported by lockdep: ============================================ WARNING: possible recursive locking detected 6.7.0 #40 Not tainted -------------------------------------------- kworker/u16:5/90 is trying to acquire lock: ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pcie_aspm_pm_state_change+0x58/0xdc but task is already holding lock: ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pci_walk_bus+0x34/0xbc other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(pci_bus_sem); lock(pci_bus_sem); *** DEADLOCK *** Call trace: print_deadlock_bug+0x25c/0x348 __lock_acquire+0x10a4/0x2064 lock_acquire+0x1e8/0x318 down_read+0x60/0x184 pcie_aspm_pm_state_change+0x58/0xdc pci_set_full_power_state+0xa8/0x114 pci_set_power_state+0xc4/0x120 qcom_pcie_enable_aspm+0x1c/0x3c [pcie_qcom] pci_walk_bus+0x64/0xbc qcom_pcie_host_post_init_2_7_0+0x28/0x34 [pcie_qcom] The deadlock can easily be reproduced on machines like the Lenovo ThinkPad X13s by adding a delay to increase the race window during asynchronous probe where another thread can take a write lock. Add a new pci_set_power_state_locked() and associated helper functions that can be called with the PCI bus semaphore held to avoid taking the read lock twice.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-667•Improper Locking

    The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected Systems

  • linux•linux

    ≥ b9c370b61d735a0e5390c42771e7eb21413f7868, < 0f7908a016c092cfdaa16d785fa5099d867bc1a3 | ≥ 8cc22ba3f77c59df5f1ac47d62df51efb28cd868, < b0f4478838be1f1d330061201898fef65bf8fd7c | ≥ f93e71aea6c60ebff8adbd8941e678302d377869, < ef90508574d7af48420bdc5f7b9a4f1cdd26bc70 | ≥ f93e71aea6c60ebff8adbd8941e678302d377869, < 1e560864159d002b453da42bd2c13a1805515a20 | 1f2f662c8bec75d1311e063efaa9107435cf16c8 | ≥ 6.1.72, < 6.1.88 | ≥ 6.6.11, < 6.6.29 | ≥ 5.15.147, < 5.16 | 6.7

  • linux•linux_kernel

    ≥ 6.7.0, < 6.7.5

References (4)