CVE-2022-50244

Summary

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

cxl: fix possible null-ptr-deref in cxl_pci_init_afu|adapter()

If device_register() fails in cxl_pci_afu|adapter(), the device is not added, device_unregister() can not be called in the error path, otherwise it will cause a null-ptr-deref because of removing not added device.

As comment of device_register() says, it should use put_device() to give up the reference in the error path. So split device_unregister() into device_del() and put_device(), then goes to put dev when register fails.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 82e68432668ae75b4c814d160f6987ecb0681273affected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 82e5481428faf11c79b9c094dd24a1849bbf64acaffected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < c4b2e35df919d99bbbed033c2fa0b607f9f463b5affected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 361412dae1690d4b5df6f92fc943cdc773c95cbcaffected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdecaffected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 22511eefa61db26e12c97dd7ada3071dbdfcb004affected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 139abd4c626a6f7ce02789ed5f73aa2256e0542baffected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 2f5fd31b2f24b9b8a80ab566fd8c4e1e94cb4339affected
LinuxLinuxf204e0b8cedd7da1dfcfd05ed6b7692737e24029 < 02cd3032b154fa02fdf90e7467abaeed889330b2affected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux4.9.337 <= 4.9.*unaffected
LinuxLinux4.14.303 <= 4.14.*unaffected
LinuxLinux4.19.270 <= 4.19.*unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.86 <= 5.15.*unaffected
LinuxLinux6.0.16 <= 6.0.*unaffected
LinuxLinux6.1.2 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

References