CVE - CVE-2023-52455

CVE-ID
CVE-2023-52455	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: iommu: Don't reserve 0-length IOVA region When the bootloader/firmware doesn't setup the framebuffers, their address and size are 0 in "iommu-addresses" property. If IOVA region is reserved with 0 length, then it ends up corrupting the IOVA rbtree with an entry which has pfn_hi < pfn_lo. If we intend to use display driver in kernel without framebuffer then it's causing the display IOMMU mappings to fail as entire valid IOVA space is reserved when address and length are passed as 0. An ideal solution would be firmware removing the "iommu-addresses" property and corresponding "memory-region" if display is not present. But the kernel should be able to handle this by checking for size of IOVA region and skipping the IOVA reservation if size is 0. Also, add a warning if firmware is requesting 0-length IOVA region reservation.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/5e23e283910c9f30248732ae0770bcb0c9438abf URL:https://git.kernel.org/stable/c/5e23e283910c9f30248732ae0770bcb0c9438abf MISC:https://git.kernel.org/stable/c/98b8a550da83cc392a14298c4b3eaaf0332ae6ad URL:https://git.kernel.org/stable/c/98b8a550da83cc392a14298c4b3eaaf0332ae6ad MISC:https://git.kernel.org/stable/c/bb57f6705960bebeb832142ce9abf43220c3eab1 URL:https://git.kernel.org/stable/c/bb57f6705960bebeb832142ce9abf43220c3eab1
Assigning CNA
kernel.org
Date Record Created
20240220	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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