5.5

CVE-2025-71233

PCI: endpoint: Avoid creating sub-groups asynchronously

In the Linux kernel, the following vulnerability has been resolved:

PCI: endpoint: Avoid creating sub-groups asynchronously

The asynchronous creation of sub-groups by a delayed work could lead to a
NULL pointer dereference when the driver directory is removed before the
work completes.

The crash can be easily reproduced with the following commands:

  # cd /sys/kernel/config/pci_ep/functions/pci_epf_test
  # for i in {1..20}; do mkdir test && rmdir test; done

  BUG: kernel NULL pointer dereference, address: 0000000000000088
  ...
  Call Trace:
   configfs_register_group+0x3d/0x190
   pci_epf_cfs_work+0x41/0x110
   process_one_work+0x18f/0x350
   worker_thread+0x25a/0x3a0

Fix this issue by using configfs_add_default_group() API which does not
have the deadlock problem as configfs_register_group() and does not require
the delayed work handler.

[mani: slightly reworded the description and added stable list]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.12 < 5.15.201
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.164
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.127
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.72
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.11
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.1
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.071
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.