{"id":"CVE-2025-68760","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-68760","generatedAt":"2026-10-28T03:42:57.747Z","title":"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 >…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Fix potential out-of-bounds read in iommu_mmio_show\n\nIn iommu_mmio_write(), it validates the user-provided offset with the\ncheck: `iommu->dbg_mmio_offset > iommu->mmio_phys_end - 4`.\nThis assumes a 4-byte access. However, the corresponding\nshow handler, iommu_mmio_show(), uses readq() to perform an 8-byte\n(64-bit) read.\n\nIf a user provides an offset equal to `mmio_phys_end - 4`, the check\npasses, and will lead to a 4-byte out-of-bounds read.\n\nFix this by adjusting the boundary check to use sizeof(u64), which\ncorresponds to the size of the readq() operation.","published":"2026-01-05T10:15:57.000Z","lastModified":"2026-10-14T19:10:00.000Z","status":"Deferred","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00184,"percentile":0.07943,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/0ec4aaf5f3f559716a6559f3d6d9616e9470bed6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a0c7005333f9a968abb058b1d77bbcd7fb7fd1e7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b959df804c33913dbfdb90750f2d693502b3d126","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-68760","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}