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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/02cd3032b154fa02fdf90e7467abaeed889330b2 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/02cd3032b154fa02fdf90e7467abaeed889330b2Patch
• https://git.kernel.org/stable/c/0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdecPatch
• https://git.kernel.org/stable/c/139abd4c626a6f7ce02789ed5f73aa2256e0542bPatch
• https://git.kernel.org/stable/c/22511eefa61db26e12c97dd7ada3071dbdfcb004Patch
• https://git.kernel.org/stable/c/2f5fd31b2f24b9b8a80ab566fd8c4e1e94cb4339Patch
• https://git.kernel.org/stable/c/361412dae1690d4b5df6f92fc943cdc773c95cbcPatch
• https://git.kernel.org/stable/c/82e5481428faf11c79b9c094dd24a1849bbf64acPatch
• https://git.kernel.org/stable/c/82e68432668ae75b4c814d160f6987ecb0681273Patch