CVE-2024-35957

CVE Details

Release Date:

2024-05-20

Description

In the Linux kernel, the following vulnerability has been resolved:\niommu/vt-d: Fix WARN_ON in iommu probe path\nCommit 1a75cc710b95 ('iommu/vt-d: Use rbtree to track iommu probed\ndevices') adds all devices probed by the iommu driver in a rbtree\nindexed by the source ID of each device. It assumes that each device\nhas a unique source ID. This assumption is incorrect and the VT-d\nspec doesn't state this requirement either.\nThe reason for using a rbtree to track devices is to look up the device\nwith PCI bus and devfunc in the paths of handling ATS invalidation time\nout error and the PRI I/O page faults. Both are PCI ATS feature related.\nOnly track the devices that have PCI ATS capabilities in the rbtree to\navoid unnecessary WARN_ON in the iommu probe path. Otherwise, on some\nplatforms below kernel splat will be displayed and the iommu probe results\nin failure.\nWARNING: CPU: 3 PID: 166 at drivers/iommu/intel/iommu.c:158 intel_iommu_probe_device+0x319/0xd90\nCall Trace:\n\n? __warn+0x7e/0x180\n? intel_iommu_probe_device+0x319/0xd90\n? report_bug+0x1f8/0x200\n? handle_bug+0x3c/0x70\n? exc_invalid_op+0x18/0x70\n? asm_exc_invalid_op+0x1a/0x20\n? intel_iommu_probe_device+0x319/0xd90\n? debug_mutex_init+0x37/0x50\n__iommu_probe_device+0xf2/0x4f0\niommu_probe_device+0x22/0x70\niommu_bus_notifier+0x1e/0x40\nnotifier_call_chain+0x46/0x150\nblocking_notifier_call_chain+0x42/0x60\nbus_notify+0x2f/0x50\ndevice_add+0x5ed/0x7e0\nplatform_device_add+0xf5/0x240\nmfd_add_devices+0x3f9/0x500\n? preempt_count_add+0x4c/0xa0\n? up_write+0xa2/0x1b0\n? __debugfs_create_file+0xe3/0x150\nintel_lpss_probe+0x49f/0x5b0\n? pci_conf1_write+0xa3/0xf0\nintel_lpss_pci_probe+0xcf/0x110 [intel_lpss_pci]\npci_device_probe+0x95/0x120\nreally_probe+0xd9/0x370\n? __pfx___driver_attach+0x10/0x10\n__driver_probe_device+0x73/0x150\ndriver_probe_device+0x19/0xa0\n__driver_attach+0xb6/0x180\n? __pfx___driver_attach+0x10/0x10\nbus_for_each_dev+0x77/0xd0\nbus_add_driver+0x114/0x210\ndriver_register+0x5b/0x110\n? __pfx_intel_lpss_pci_driver_init+0x10/0x10 [intel_lpss_pci]\ndo_one_initcall+0x57/0x2b0\n? kmalloc_trace+0x21e/0x280\n? do_init_module+0x1e/0x210\ndo_init_module+0x5f/0x210\nload_module+0x1d37/0x1fc0\n? init_module_from_file+0x86/0xd0\ninit_module_from_file+0x86/0xd0\nidempotent_init_module+0x17c/0x230\n__x64_sys_finit_module+0x56/0xb0\ndo_syscall_64+0x6e/0x140\nentry_SYSCALL_64_after_hwframe+0x71/0x79

See more information about CVE-2024-35957 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

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

Errata information

Platform	Errata	Release Date
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14