{"api_version":"1","generated_at":"2026-07-27T22:38:47+00:00","cve":"CVE-2026-64290","urls":{"html":"https://cve.report/CVE-2026-64290","api":"https://cve.report/api/cve/CVE-2026-64290.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64290","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64290"},"summary":{"title":"iommufd: Break the loop on failure in iommufd_fault_fops_read()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Break the loop on failure in iommufd_fault_fops_read()\n\nOn a copy_to_user() failure inside the inner list_for_each_entry, only the\ninner loop breaks; the outer while re-fetches the just-restored fault group\nand retries the failing copy_to_user() forever, spinning the reader at 100%\nCPU with fault->mutex held.\n\nCheck rc after the inner loop and break the outer while as well.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:09","updated_at":"2026-07-25 10:17:09"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee","name":"https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8","name":"https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a","name":"https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64290","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64290","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed f66c16b175509642ee7082df57c9bf3deaebae1a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed 172fc8b19825a0f5884c38f2289188284e2d45ee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64290","cve":"CVE-2026-64290","epss":"0.001980000","percentile":"0.098630000","score_date":"2026-07-26","updated_at":"2026-07-27 00:02:03"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iommu/iommufd/eventq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8","status":"affected","version":"07838f7fd529c8a6de44b601d4b7057e6c8d36ed","versionType":"git"},{"lessThan":"f66c16b175509642ee7082df57c9bf3deaebae1a","status":"affected","version":"07838f7fd529c8a6de44b601d4b7057e6c8d36ed","versionType":"git"},{"lessThan":"172fc8b19825a0f5884c38f2289188284e2d45ee","status":"affected","version":"07838f7fd529c8a6de44b601d4b7057e6c8d36ed","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/iommu/iommufd/eventq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Break the loop on failure in iommufd_fault_fops_read()\n\nOn a copy_to_user() failure inside the inner list_for_each_entry, only the\ninner loop breaks; the outer while re-fetches the just-restored fault group\nand retries the failing copy_to_user() forever, spinning the reader at 100%\nCPU with fault->mutex held.\n\nCheck rc after the inner loop and break the outer while as well."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:49:30.049Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8"},{"url":"https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a"},{"url":"https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee"}],"title":"iommufd: Break the loop on failure in iommufd_fault_fops_read()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64290","datePublished":"2026-07-25T08:49:30.049Z","dateReserved":"2026-07-19T15:36:31.778Z","dateUpdated":"2026-07-25T08:49:30.049Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:09","lastModifiedDate":"2026-07-25 10:17:09","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64290","Ordinal":"1","Title":"iommufd: Break the loop on failure in iommufd_fault_fops_read()","CVE":"CVE-2026-64290","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64290","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Break the loop on failure in iommufd_fault_fops_read()\n\nOn a copy_to_user() failure inside the inner list_for_each_entry, only the\ninner loop breaks; the outer while re-fetches the just-restored fault group\nand retries the failing copy_to_user() forever, spinning the reader at 100%\nCPU with fault->mutex held.\n\nCheck rc after the inner loop and break the outer while as well.","Type":"Description","Title":"iommufd: Break the loop on failure in iommufd_fault_fops_read()"}]}}}