CVE-2024-46750

CVE Details

Release Date:

2024-09-18

Description

In the Linux kernel, the following vulnerability has been resolved:\nPCI: Add missing bridge lock to pci_bus_lock()\nOne of the true positives that the cfg_access_lock lockdep effort\nidentified is this sequence:\nWARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70\nRIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70\nCall Trace:\n\n? __warn+0x8c/0x190\n? pci_bridge_secondary_bus_reset+0x5d/0x70\n? report_bug+0x1f8/0x200\n? handle_bug+0x3c/0x70\n? exc_invalid_op+0x18/0x70\n? asm_exc_invalid_op+0x1a/0x20\n? pci_bridge_secondary_bus_reset+0x5d/0x70\npci_reset_bus+0x1d8/0x270\nvmd_probe+0x778/0xa10\npci_device_probe+0x95/0x120\nWhere pci_reset_bus() users are triggering unlocked secondary bus resets.\nIronically pci_bus_reset(), several calls down from pci_reset_bus(), uses\npci_bus_lock() before issuing the reset which locks everything *but* the\nbridge itself.\nFor the same motivation as adding:\nbridge = pci_upstream_bridge(dev);\nif (bridge)\npci_dev_lock(bridge);\nto pci_reset_function() for the 'bus' and 'cxl_bus' reset cases, add\npci_dev_lock() for @bus->self to pci_bus_lock().\n[bhelgaas: squash in recursive locking deadlock fix from Keith Busch:\nhttps://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]

See more information about CVE-2024-46750 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	5.5
Vector String:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality:	None
Integrity:	None
Availability:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12813	2024-11-12
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12868	2024-12-06
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12813	2024-11-12
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12815	2024-11-11
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12815	2024-11-11