vulnerability

Ubuntu: (Multiple Advisories) (CVE-2024-35843): Linux kernel vulnerabilities

Severity
6
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:C)
Published
05/17/2024
Added
07/01/2024
Modified
02/20/2025

Description

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.

Solution(s)

ubuntu-upgrade-linux-image-6-8-0-1004-gkeubuntu-upgrade-linux-image-6-8-0-1005-raspiubuntu-upgrade-linux-image-6-8-0-1006-ibmubuntu-upgrade-linux-image-6-8-0-1006-oemubuntu-upgrade-linux-image-6-8-0-1006-oracleubuntu-upgrade-linux-image-6-8-0-1006-oracle-64kubuntu-upgrade-linux-image-6-8-0-1008-azureubuntu-upgrade-linux-image-6-8-0-1008-azure-fdeubuntu-upgrade-linux-image-6-8-0-1008-gcpubuntu-upgrade-linux-image-6-8-0-1009-awsubuntu-upgrade-linux-image-6-8-0-35-genericubuntu-upgrade-linux-image-6-8-0-35-generic-64kubuntu-upgrade-linux-image-6-8-0-35-lowlatencyubuntu-upgrade-linux-image-6-8-0-35-lowlatency-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-fdeubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-classicubuntu-upgrade-linux-image-ibm-lts-24-04ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-oem-24-04ubuntu-upgrade-linux-image-oem-24-04aubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-24-04
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