iommufd: Break the loop on failure in iommufd_fault_fops_read()

{
  "id": "dfc2f1c42192cb56c440f8f23d73fdc1a236cb67548a1cc8f3682ffcbd169a60",
  "url": "https://osv.dev/vulnerability/CVE-2026-64290",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iommufd: Break the loop on failure in iommufd_fault_fops_read()",
    "summary": "In 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.",
    "evidence": "osv:CVE-2026-64290",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-64290",
      "aliases": [
        "CVE-2026-64290"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed"
                },
                {
                  "fixed": "a38e0714affc5c0bbb40cba5a65d6d32a5e72a71"
                },
                {
                  "fixed": "5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8"
                },
                {
                  "fixed": "f66c16b175509642ee7082df57c9bf3deaebae1a"
                },
                {
                  "fixed": "172fc8b19825a0f5884c38f2289188284e2d45ee"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64290.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.11.0"
                },
                {
                  "fixed": "6.12.101"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.39"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64290.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.437379138Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee",
        "https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8",
        "https://git.kernel.org/stable/c/a38e0714affc5c0bbb40cba5a65d6d32a5e72a71",
        "https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64290.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64290",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64290.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64290",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509832,
  "published_at": "2026-07-25T08:49:30.049+00:00"
}