iommufd: Break the loop on failure in iommufd_fault_fops_read()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64290
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:09 UTC
Updated2026-07-25 10:17:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: iommufd: Break the loop on failure in iommufd_fault_fops_read() On a copy_to_user() failure inside the inner list_for_each_entry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the failing copy_to_user() forever, spinning the reader at 100% CPU with fault->mutex held. Check rc after the inner loop and break the outer while as well.

Risk And Classification

EPSS: 0.001980000 probability, percentile 0.098630000 (date 2026-07-26)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 git Not specified
CNA Linux Linux affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed f66c16b175509642ee7082df57c9bf3deaebae1a git Not specified
CNA Linux Linux affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed 172fc8b19825a0f5884c38f2289188284e2d45ee git Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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