CVE-2026-80676

Summary

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]

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd765edbb301c0e196015a59b17420558088ea33f < d1cb12ae81d2f7a58b0b1cfb51862afca98e6058affected
LinuxLinuxd765edbb301c0e196015a59b17420558088ea33f < 0e2f0833556c8c5269deb457b89d538644a3b747affected
LinuxLinuxd765edbb301c0e196015a59b17420558088ea33f < 2fb010ea7ca98cd09a6d365260b769f627e73a76affected
LinuxLinuxd765edbb301c0e196015a59b17420558088ea33f < 331d8900121a1d74ecd45cd2db742ddcb5a0a565affected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References