CVE-2025-68760 - iommu/amd: Fix potential out-of-bounds read in iommu_mmio_show

CVE ID : CVE-2025-68760 Published : Jan. 5, 2026, 10:15 a.m. | 46 minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix potential out-of-bounds read in iommu_mmio_show In iommu_mmio_write(), it validates the user-provided offset with the check: `iommu->dbg_mmio_offset > iommu->mmio_phys_end - 4`. This assumes a 4-byte access. However, the corresponding show handler, iommu_mmio_show(), uses readq() to perform an 8-byte (64-bit) read. If a user provides an offset equal to `mmio_phys_end - 4`, the check passes, and will lead to a 4-byte out-of-bounds read. Fix this by adjusting the boundary check to use sizeof(u64), which corresponds to the size of the readq() operation. Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...

Source: Telegram CVE Monitor