SB2026072794 - Infinite loop in Linux kernel vfio driver

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Main Vulnerability Database SB2026072794

SB2026072794 - Infinite loop in Linux kernel vfio driver

Published: July 27, 2026

Security Bulletin ID SB2026072794
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Infinite loop (CVE-ID: CVE-2026-64474)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of an error sentinel in vfio_mig_get_next_state() when processing blocked VFIO migration state transitions. A local user can trigger a blocked transition on a precopy-capable device to cause a denial of service.

The issue can cause the loop to spin forever while holding the driver state mutex, resulting in a soft lockup and potentially a panic if softlockup_panic is set.


Remediation

Install update from vendor's website.

References