CVE-2026-97948 (GCVE-0-2026-97948)
Vulnerability from cvelistv5
Published
2026-09-25 10:22
Modified
2026-10-19 09:11
Severity ?
Summary
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. [<0>] 0xc00000011c78f870 [<0>] __switch_to+0xfc/0x1a0 [<0>] pci_lock_rescan_remove+0x30/0x44 [<0>] eeh_rmv_device+0x290/0x2e0 [<0>] eeh_pe_dev_traverse+0x80/0x130 [<0>] eeh_reset_device+0xcc/0x23c [<0>] eeh_handle_normal_event+0x830/0xa80 [<0>] eeh_event_handler+0xf8/0x190 [<0>] kthread+0x194/0x1b0 [<0>] 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).
References
Impacted products
Vendor Product Version
Linux Linux Version: 502f08831a9afb72dc98a56ae6504da43e93b250
Version: f56e004b781719d8fdf6c9619b15caf2579bc1f2
Version: 59c6d3d81d42bf543c90597b4f38c53d6874c5a1
Version: a426e8a6ae161f51888585b065db0f8f93ab2e16
Version: d2c60a8a387e9fcc28447ef36c03f8e49fd052a6
Version: 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7
Version: 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7
Version: 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7
Version: d42bbd8f30ac38b1ce54715bf08ec3dac18d6b25
Version: 19d5036e7ad766cf212aebec23b9f1d7924a62bc
Version: 5.10.241   ≤
Version: 5.15.190   ≤
Version: 6.1.148   ≤
Version: 6.6.102   ≤
Version: 6.12.42   ≤
Version: 6.15.10   ≤
Version: 6.16.1   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/eeh: Fix recursive locking on devices without EEH sensitive driver\n\nThe commit 1010b4c012b0 (\"powerpc/eeh: Make EEH driver device hotplug\nsafe\") refactored the EEH code such that the pci_rescan_remove_lock is\nheld at the beginning of eeh_handle_normal_event() and the\neeh_reset_device() is called with that lock being held. Looks like the\ncommit missed to remove the existing lock/unlock inside eeh_rmv_device()\nwhich is no longer necessary. This is causing the eehd to hang on the\nlock which it actually holds when that code path is taken.\n\n[\u003c0\u003e] 0xc00000011c78f870\n[\u003c0\u003e] __switch_to+0xfc/0x1a0\n[\u003c0\u003e] pci_lock_rescan_remove+0x30/0x44\n[\u003c0\u003e] eeh_rmv_device+0x290/0x2e0\n[\u003c0\u003e] eeh_pe_dev_traverse+0x80/0x130\n[\u003c0\u003e] eeh_reset_device+0xcc/0x23c\n[\u003c0\u003e] eeh_handle_normal_event+0x830/0xa80\n[\u003c0\u003e] eeh_event_handler+0xf8/0x190\n[\u003c0\u003e] kthread+0x194/0x1b0\n[\u003c0\u003e] start_kernel_thread+0x14/0x18\n\nThe issue is seen for cases where the errors are detected on the PHB\ndirectly AND|OR for devices where the driver error_detected() returns\nPCI_ERS_RESULT_NEED_RESET, and driver being not EEH sensitive(i.e no\nerror handlers like slot_reset(), resume() etc defined)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:11:14.563Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3833dfae0680b6b16e2469fbc90aa48376311cd8"
        },
        {
          "url": "https://git.kernel.org/stable/c/24524fca27da674668941440e8e05cdfec0b0222"
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        {
          "url": "https://git.kernel.org/stable/c/a58531181363219fa5de2b53d5d7274dcdfca98b"
        },
        {
          "url": "https://git.kernel.org/stable/c/460fab22b65138531082910702f74b048b25237b"
        },
        {
          "url": "https://git.kernel.org/stable/c/102e3dc5ab5ba052e294819e83384166b242c1ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/2920af33d097ca335e492b346af70b72986ad6dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/85d8eaefc052cf3e5ae2c7bafeda2db68b8898b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c5e68706527968282e49de205cc2b935823cb88a"
        }
      ],
      "title": "powerpc/eeh: Fix recursive locking on devices without EEH sensitive driver",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97948",
    "datePublished": "2026-09-25T10:22:57.757Z",
    "dateReserved": "2026-09-25T10:18:58.204Z",
    "dateUpdated": "2026-10-19T09:11:14.563Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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