cbcvebase.
CVE-2024-35843
published 2024-05-17

CVE-2024-35843: In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Use device rbtree in iopf reporting path The existing I/O page fault handler…

PriorityP342high8.8CVSS 3.1
AVLACLPRLUINSCCHIHAH
EPSS
0.22%
12.3th percentile
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Use device rbtree in iopf reporting path The existing I/O page fault handler currently locates the PCI device by calling pci_get_domain_bus_and_slot(). This function searches the list of all PCI devices until the desired device is found. To improve lookup efficiency, replace it with device_rbtree_find() to search the device within the probed device rbtree. The I/O page fault is initiated by the device, which does not have any synchronization mechanism with the software to ensure that the device stays in the probed device tree. Theoretically, a device could be released by the IOMMU subsystem after device_rbtree_find() and before iopf_get_dev_fault_param(), which would cause a use-after-free problem. Add a mutex to synchronize the I/O page fault reporting path and the IOMMU release device path. This lock doesn't introduce any performance overhead, as the conflict between I/O page fault reporting and device releasing is very rare.

Affected

10 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.8.9-1 (forky)linux 6.8.9-1 (forky)
linuxlinux
linuxlinux>= 06f4b8d09dbabec631ed7b033f5d5413d86c7134 < 3d39238991e745c5df85785604f037f35d9d1b153d39238991e745c5df85785604f037f35d9d1b15
linuxlinux>= 06f4b8d09dbabec631ed7b033f5d5413d86c7134 < def054b01a867822254e1dda13d587f5c7a99e2adef054b01a867822254e1dda13d587f5c7a99e2a
linuxlinux_kernel< 6.8.26.8.2
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 6.8.0-35.356.8.0-35.35
msrcazl3_kernel_6.6.92.2-1_on_azure_linux_3.0
msrccbl2_kernel_5.15.182.1-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
osv6.8MEDIUM
vendor_debian6.8MEDIUM
vendor_msrc6.8MEDIUM
vendor_redhat6.8MEDIUM
vendor_ubuntu6.3MEDIUM
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