CVE-2022-50767

Summary

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

fbdev: smscufx: Fix several use-after-free bugs

Several types of UAFs can occur when physically removing a USB device.

Adds ufx_ops_destroy() function to .fb_destroy of fb_ops, and in this function, there is kref_put() that finally calls ufx_free().

This fix prevents multiple UAFs.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953faffected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 3f40852d671072836fb7ae331a1f28a24223c4e8affected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 70faf9d9b6cc74418716bbf76fe75bd2da10ad4aaffected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 5385af2f89bc352fb70753ab41b2bb036190141faffected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < d9ddfeb01fb95ffbbc7031d46a5ee2a5e45cbb86affected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < cc6a7249842fceda7574ceb63275a2d5e99d2862affected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 8d924b262f3178a9b17c17d4306a9f426c508bd9affected
LinuxLinux3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < cc67482c9e5f2c80d62f623bcc347c29f9f648e1affected
LinuxLinux3.2affected
LinuxLinux0 < 3.2unaffected
LinuxLinux4.9.332 <= 4.9.*unaffected
LinuxLinux4.14.298 <= 4.14.*unaffected
LinuxLinux4.19.264 <= 4.19.*unaffected
LinuxLinux5.4.223 <= 5.4.*unaffected
LinuxLinux5.10.153 <= 5.10.*unaffected
LinuxLinux5.15.77 <= 5.15.*unaffected
LinuxLinux6.0.7 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

References