The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Remove latent out-of-bounds     access in IOMMU debugfs In iommu_mmio_write() and iommu_capability_write(), the variables dbg_mmio_offset     and dbg_cap_offset are declared as int. However, they are populated using kstrtou32_from_user(). If a user     provides a sufficiently large value, it can become a negative integer. Prior to this patch, the AMD IOMMU     debugfs implementation was already protected by different mechanisms. 1. #define OFS_IN_SZ 8 ensures the     user string <= 8 bytes, so e.g. 0xffffffff isn't a valid input. if (cnt > OFS_IN_SZ) return -EINVAL; 2.
    Implicit type promotion in iommu_mmio_write(), dbg_mmio_offset is int and iommu->mmio_phys_end is u64 if     (dbg_mmio_offset > iommu->mmio_phys_end - sizeof(u64)) return -EINVAL; 3. The show handlers would     currently catch the negative number and refuse to perform the read. Replace kstrtou32_from_user() with     kstrtos32_from_user() to parse the input, and check for negative values to explicitly prevent out-of-     bounds memory accesses directly in iommu_mmio_write() and iommu_capability_write(). (CVE-2026-64186)

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Linux Distros Unpatched Vulnerability : CVE-2026-64186

high Nessus Plugin ID 328262

Version 1.5