CVE-2026-31527

Summary

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

driver core: platform: 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
LinuxLinux3d713e0e382e6fcfb4bba1501645b66c129ad60b < 492349e5e4a369a8b62781100a3ade470bf1ce6baffected
LinuxLinux3d713e0e382e6fcfb4bba1501645b66c129ad60b < 9a6086d2a828dd2ff74cf9abcae456670febd71faffected
LinuxLinux3d713e0e382e6fcfb4bba1501645b66c129ad60b < 7c02a9bd7d14a89065fcf672b86d8e1d1a41d3b1affected
LinuxLinux3d713e0e382e6fcfb4bba1501645b66c129ad60b < edee7ee5a14c3b33f6d54641f5af5c5e9180992daffected
LinuxLinux3d713e0e382e6fcfb4bba1501645b66c129ad60b < 2b38efc05bf7a8568ec74bfffea0f5cfa62bc01daffected
LinuxLinux3.17affected
LinuxLinux0 < 3.17unaffected
LinuxLinux6.6.142 <= 6.6.*unaffected
LinuxLinux6.12.80 <= 6.12.*unaffected
LinuxLinux6.18.21 <= 6.18.*unaffected
LinuxLinux6.19.11 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References