CVE-2026-80676 PUBLISHED

Drivers: hv: vmbus: use generic driver_override infrastructure

Assigner: Linux
Reserved: 26.08.2026 Published: 28.08.2026 Updated: 28.08.2026

In the Linux kernel, the following vulnerability has been resolved:

Drivers: hv: vmbus: use generic driver_override infrastructure

When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF.

Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally.

Note that calling match() from __driver_attach() without the device lock held is intentional. [1]

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from d765edbb301c0e196015a59b17420558088ea33f to d1cb12ae81d2f7a58b0b1cfb51862afca98e6058 (excl.)
  • affected from d765edbb301c0e196015a59b17420558088ea33f to 0e2f0833556c8c5269deb457b89d538644a3b747 (excl.)
  • affected from d765edbb301c0e196015a59b17420558088ea33f to 2fb010ea7ca98cd09a6d365260b769f627e73a76 (excl.)
  • affected from d765edbb301c0e196015a59b17420558088ea33f to 331d8900121a1d74ecd45cd2db742ddcb5a0a565 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 4.20 is affected
  • unaffected from 0 to 4.20 (excl.)
  • unaffected from 6.12.97 to 6.12.* (incl.)
  • unaffected from 6.18.40 to 6.18.* (incl.)
  • unaffected from 7.1.5 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References