CVE-2023-53630

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.3.0-rc2-eeac8ede1755

Description A flaw exists in the Linux kernel's iommufd subsystem related to the unpinning of pages when an access is present. Specifically, an incorrect calculation of batch last index can cause the unmap operation to run over the end of the pages, leading to corruption of pages that were not mapped. This issue was identified by syzkaller and can trigger debugging warnings related to pinned pages. The root cause is an error in the calculation used during the unmapping process, potentially leading to out-of-bounds access.

Recommendations Update to Linux kernel version 6.3.0-rc2-eeac8ede1755 or a later version to address this issue.