CVE-2026-97948
Zusammenfassung
von MITRE • 25.09.2026
In the Linux kernel, the following vulnerability has been resolved:
powerpc/eeh: Fix recursive locking on devices without EEH sensitive driver
The commit 1010b4c012b0 ("powerpc/eeh: Make EEH driver device hotplug safe") refactored the EEH code such that the pci_rescan_remove_lock is held at the beginning of eeh_handle_normal_event() and the eeh_reset_device() is called with that lock being held. Looks like the commit missed to remove the existing lock/unlock inside eeh_rmv_device() which is no longer necessary. This is causing the eehd to hang on the lock which it actually holds when that code path is taken.
[] 0xc00000011c78f870
[] __switch_to+0xfc/0x1a0
[] pci_lock_rescan_remove+0x30/0x44
[] eeh_rmv_device+0x290/0x2e0
[] eeh_pe_dev_traverse+0x80/0x130
[] eeh_reset_device+0xcc/0x23c
[] eeh_handle_normal_event+0x830/0xa80
[] eeh_event_handler+0xf8/0x190
[] kthread+0x194/0x1b0
[] start_kernel_thread+0x14/0x18
The issue is seen for cases where the errors are detected on the PHB directly AND|OR for devices where the driver error_detected() returns PCI_ERS_RESULT_NEED_RESET, and driver being not EEH sensitive(i.e no error handlers like slot_reset(), resume() etc defined).
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