Infinite loop in Linux kernel - CVE-2026-64474
Published: July 27, 2026
Vulnerability identifier: #VU139470
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-64474
CWE-ID: CWE-835
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-64474
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/7f2d6b31089e48db4653df832c9a6afdde9a1c29
- https://git.kernel.org/stable/c/8e872c07e40d51a66dee7b280a23a460a2e1e3fa
- https://git.kernel.org/stable/c/a26b499b757cfc8bbff1088bb1b844639e250893
- https://git.kernel.org/stable/c/a3a8afa2f6e7f0dc266d08f02be3f3054241ba47
- https://git.kernel.org/stable/c/ed7d5599e6c398da74845767cd1e6a8370a160fc