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CVE-2026-97948

Linux: powerpc/eeh: Fix recursive locking on devices without EEH sensitive driver

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3833dfae0680b6b16e2469fbc90aa48376311cd8Also 24524fca27da674668941440e8e05cdfec0b0222, 460fab22b65138531082910702f74b048b25237b and 10 moreCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 3833dfae0680b6b16e2469fbc90aa48376311cd8LinuxCVE List
  • 24524fca27da674668941440e8e05cdfec0b0222LinuxCVE List
  • 460fab22b65138531082910702f74b048b25237bLinuxCVE List
  • 102e3dc5ab5ba052e294819e83384166b242c1ecLinuxCVE List
  • 2920af33d097ca335e492b346af70b72986ad6dcLinuxCVE List
  • 85d8eaefc052cf3e5ae2c7bafeda2db68b8898b4LinuxCVE List
Show all 13 fixed versions

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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).

Text from CVE List

Affected versions 27

  • Linuxaffected: 502f08831a9afb72dc98a56ae6504da43e93b250 before 3833dfae0680b6b16e2469fbc90aa48376311cd8CVE List
  • Linuxaffected: f56e004b781719d8fdf6c9619b15caf2579bc1f2 before 24524fca27da674668941440e8e05cdfec0b0222CVE List
  • Linuxaffected: 59c6d3d81d42bf543c90597b4f38c53d6874c5a1 before a58531181363219fa5de2b53d5d7274dcdfca98bCVE List
  • Linuxaffected: a426e8a6ae161f51888585b065db0f8f93ab2e16 before 460fab22b65138531082910702f74b048b25237bCVE List
  • Linuxaffected: d2c60a8a387e9fcc28447ef36c03f8e49fd052a6 before 102e3dc5ab5ba052e294819e83384166b242c1ecCVE List
  • Linuxaffected: 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7 before 2920af33d097ca335e492b346af70b72986ad6dcCVE List
  • Linuxaffected: 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7 before 85d8eaefc052cf3e5ae2c7bafeda2db68b8898b4CVE List
  • Linuxaffected: 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7 before c5e68706527968282e49de205cc2b935823cb88aCVE List
  • Linuxaffected: d42bbd8f30ac38b1ce54715bf08ec3dac18d6b25CVE List
  • Linuxaffected: 19d5036e7ad766cf212aebec23b9f1d7924a62bcCVE List
  • Linuxaffected: 5.10.241 before 5.10.271CVE List
  • Linuxaffected: 5.15.190 before 5.15.222CVE List
  • Linuxaffected: 6.1.148 before 6.1.189CVE List
  • Linuxaffected: 6.6.102 before 6.6.158CVE List
  • Linuxaffected: 6.12.42 before 6.12.111CVE List
  • Linuxaffected: 6.15.10 before 6.16CVE List
  • Linuxaffected: 6.16.1 before 6.17CVE List
  • Linuxaffected: 6.17CVE List
  • Linuxunaffected: all versions before 6.17CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8