The Linux kernel had a vulnerability in the iommu/vt-d debugfs component related to legacy mode page table dump logic. Specifically, when the Translation Type (TT) field is not 00b or 01b, the SSPTPTR value may be uninitialized or zero, leading to a kernel oops (general protection fault) caused by accessing non-canonical addresses during page table walks. The fix prevents walking the page table if TT is not 00b or 01b, thereby avoiding the fault.

Exploitation of this vulnerability can cause a kernel oops resulting in a denial of service due to a general protection fault. The CVSS vector indicates local attack vector with low attack complexity and low privileges required, no user interaction, and high confidentiality and availability impact with low integrity impact. There are no known exploits in the wild.

A fix for this vulnerability has been implemented in the Linux kernel by correcting the legacy mode page table dump logic to avoid walking the page table when TT is not 00b or 01b. Users should apply the official kernel updates containing this fix once available. Patch status is not yet confirmed in the provided data; check the vendor advisory for current remediation guidance.