5.5

CVE-2026-64290

iommufd: Break the loop on failure in iommufd_fault_fops_read()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.11 < 6.12.101
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.39
Linux ≫ Linux Kernel Version >= 6.19 < 7.1.4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.052
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

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