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Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: vfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc… (CVE-2026-64474)

0
Medium
Published: 07/25/2026 (07/25/2026, 10:17:00 UTC)
Source: GCVE Database
Product: linux-hwe-edge

Description

In the Linux kernel, the following vulnerability has been resolved: vfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc vfio_mig_get_next_state() walks vfio_from_fsm_table[] one step at a time, looping to skip optional states the device does not support until *next_fsm is supported. A blocked transition is encoded as VFIO_DEVICE_STATE_ERROR, which the trailing return reports as -EINVAL. The skip loop does not account for the ERROR sentinel. state_flags_table[ERROR] is ~0U and vfio_from_fsm_table[ERROR][*] is ERROR, so once *next_fsm becomes ERROR the loop condition stays true and *next_fsm never changes. The blocked arcs STOP_COPY -> PRE_COPY and STOP_COPY -> PRE_COPY_P2P map to ERROR yet pass the support check on a precopy-capable device, causing the loop to spin forever while holding the driver state mutex. This can result in a soft lockup, and a panic with softlockup_panic set. Terminate the skip loop on the ERROR sentinel so a blocked transition falls through to the existing return and reports -EINVAL.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-67fj-9v49-3ch9
Osv Schema Version
1.4.0
Aliases
["CVE-2026-64474"]
Ecosystems
[]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a6542079c2644c7f8082712

Added to database: 07/25/2026, 23:08:55 UTC

Last enriched: 08/15/2026, 02:25:10 UTC

Last updated: 09/07/2026, 10:52:10 UTC

Views: 41

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