FKIE_CVE-2022-50481

Vulnerability from fkie_nvd - Published: 2025-10-04 16:15 - Updated: 2026-01-23 20:12
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ae581696b7a799afa39a664c4b721569643f58aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60b2ed21a65f3f5318666ccd765c3507991370cfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/61c80d1c3833e196256fb060382db94f24d3d9a7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96fba6fb95bdede80583c262ac185da09661f264Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab44c182353be101c3be9465e1d15d42130c53c4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b32559ee4e6667c5c3daf4ec5454c277d1f255d2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d775a1da5a52b4f4bb02f2707ba420d1bec48dbbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5021bbf11b024cc65ea1e84c377df484183be4bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()\n\nIf device_register() fails in cxl_register_afu|adapter(), the device\nis not added, device_unregister() can not be called in the error path,\notherwise it will cause a null-ptr-deref because of removing not added\ndevice.\n\nAs comment of device_register() says, it should use put_device() to give\nup the reference in the error path. So split device_unregister() into\ndevice_del() and put_device(), then goes to put dev when register fails."
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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