{"id":"CVE-2026-64290","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-64290","generatedAt":"2026-10-28T03:26:14.691Z","title":"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…","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.","published":"2026-07-25T10:17:10.000Z","lastModified":"2026-08-17T05:17:28.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-835"],"affected":["linux/linux kernel"],"epss":{"score":0.00159,"percentile":0.0504,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a38e0714affc5c0bbb40cba5a65d6d32a5e72a71","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64290","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."}