CVE-2022-50481

Summary

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

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

If device_register() fails in cxl_register_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
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < 96fba6fb95bdede80583c262ac185da09661f264affected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < 1ae581696b7a799afa39a664c4b721569643f58aaffected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < d775a1da5a52b4f4bb02f2707ba420d1bec48dbbaffected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < 60b2ed21a65f3f5318666ccd765c3507991370cfaffected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < 170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8affected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < e5021bbf11b024cc65ea1e84c377df484183be4baffected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < b32559ee4e6667c5c3daf4ec5454c277d1f255d2affected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < ab44c182353be101c3be9465e1d15d42130c53c4affected
LinuxLinux14baf4d9c739e6e69150512d2eb23c71fffcc192 < 61c80d1c3833e196256fb060382db94f24d3d9a7affected
LinuxLinux4.6affected
LinuxLinux0 < 4.6unaffected
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