Vulnerability in Linux
CVE-2026-64290
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.
EPSS: 0.002 (5.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux — versions 7.2-rc1, 07838f7fd529c8a6de44b601d4b7057e6c8d36ed, 7.2
- Linux Linux_kernel
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-64290?
- CVE-2026-64290 is a medium-severity vulnerability in Linux, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2026-07-25.
- How severe is CVE-2026-64290?
- Medium severity. CVSS v3 base score is 5.5 out of 10.