CVE-2025-68760
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.
Affected versions
Linux kernel versions
6.17
and later are affected. Fixed in
6.17.13,
6.18.2,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68760 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/0ec4aaf5f3f559716a6559f3d6d9616e9470bed6
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PatchKernel patch commithttps://git.kernel.org/stable/c/a0c7005333f9a968abb058b1d77bbcd7fb7fd1e7
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PatchKernel patch commithttps://git.kernel.org/stable/c/b959df804c33913dbfdb90750f2d693502b3d126
Frequently asked questions
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What is CVE-2025-68760?
CVE-2025-68760 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17 onward and has been patched in 6.17.13, 6.18.2 and 6.19. CVE-2025-68760 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-68760?
Yes — CVE-2025-68760 has been patched. Fixed versions include 6.17.13, 6.18.2 and 6.19. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68760 actively exploited?
No — CVE-2025-68760 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.