Medium 5.5Published Jul 25, 2026

CVE-2026-64290iommufd: Break the loop on failure in iommufd_fault_fops_read()

Updated under an hour ago (Oct 27, 2026, 12:30 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 07838f7fd529c8a6de44b601d4b7057e6c8d36ed before a38e0714affc5c0bbb40cba5a65d6d32a5e72a71; 07838f7fd529c8a6de44b601d4b7057e6c8d36ed builds before 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8; from 07838f7fd529c8a6de44b601d4b7057e6c8d36ed before f66c16b175509642ee7082df57c9bf3deaebae1a; 07838f7fd529c8a6de44b601d4b7057e6c8d36ed builds before 172fc8b19825a0f5884c38f2289188284e2d45ee	CNA record
linux linux_kernel linux:linux_kernel	from 6.11 before 6.12.101; from 6.13 before 6.18.39; from 6.19 before 7.1.4	NVD

References

References

https://git.kernel.org/stable/c/a38e0714affc5c0bbb40cba5a65d6d32a5e72a71	patch
https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8	patch
https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a	patch
https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.