PT-2023-8759 · Linux+4 · Linux Kernel+4
Published
2023-12-19
·
Updated
2025-09-29
·
CVE-2023-52455
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to the iommu functionality in the Linux kernel. When the bootloader or firmware does not set up framebuffers, their address and size are 0 in the "iommu-addresses" property. If an IOVA region is reserved with 0 length, it corrupts the IOVA rbtree with an entry that has pfn hi < pfn lo. This causes display IOMMU mappings to fail when using a display driver in the kernel without a framebuffer. The ideal solution would be for the firmware to remove the "iommu-addresses" property and the corresponding "memory-region" if the display is not present. However, the kernel should handle this by checking the size of the IOVA region and skipping the IOVA reservation if the size is 0. A warning should also be added if the firmware requests a 0-length IOVA region reservation.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Red Hat
Red Os
Ubuntu