Loop with Unreachable Exit Condition ('Infinite Loop') Affecting linux-6.12 package, versions <6.12.101-1~deb12u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-ECHOLATEST-LINUX612-18912410
  • published18 Aug 2026
  • disclosed25 Jul 2026

Introduced: 25 Jul 2026

CVE-2026-64290  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Echo:latest linux-6.12 to version 6.12.101-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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 Base Scores

version 3.1