CVE-2026-23221

Summary

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

bus: fsl-mc: fix use-after-free in driver_override_show()

The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock.

This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function.

Fix this by holding the device_lock around the read operation.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < c71dfb7833db7af652ee8f65011f14c97c47405daffected
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < c424e72cfa67e7e1477035058a8a659f2c0ea637affected
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < b1983840287303e0dfb401b1b6cecc5ea7471e90affected
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227affected
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < 1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0affected
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < a2ae33e1c6361e960a4d00f7cf75d880b54f9528affected
LinuxLinux1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d < 148891e95014b5dc5878acefa57f1940c281c431affected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.15.201 <= 5.15.*unaffected
LinuxLinux6.1.164 <= 6.1.*unaffected
LinuxLinux6.6.127 <= 6.6.*unaffected
LinuxLinux6.12.74 <= 6.12.*unaffected
LinuxLinux6.18.11 <= 6.18.*unaffected
LinuxLinux6.19.1 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References