CVE-2026-53117

Summary

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

s390/cio: 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
LinuxLinuxebc3d179150347f3b6d97d8f249378bb2218f95e < c4295487124f461405e1ef64dfa8c4ab0cb7ebcfaffected
LinuxLinuxebc3d179150347f3b6d97d8f249378bb2218f95e < 106d594711e97762788046c5bbb94f580abc4bf4affected
LinuxLinuxebc3d179150347f3b6d97d8f249378bb2218f95e < 2081957d8c323ffb58a10bc64837717ac5a042a1affected
LinuxLinuxebc3d179150347f3b6d97d8f249378bb2218f95e < b660ba045b2b22cf3b4be72773de00cb48f47be5affected
LinuxLinuxebc3d179150347f3b6d97d8f249378bb2218f95e < ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4affected
LinuxLinux5.3affected
LinuxLinux0 < 5.3unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References