CVE-2026-93283
In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix device_register() error path When device_register() fails in i3c_master_register_new_i3c_devs(), put_device() is called to drop the reference taken by device_register(). That drops the last reference, so the device's release callback i3c_device_release() runs and frees the i3c_device. Two problems follow from that: i3c_device_release() does WARN_ON(i3cdev->desc), so it warns because desc->dev->desc still points back at the descriptor. Clear it before calling put_device(). After put_device() frees the i3c_device, desc->dev is left pointing at freed memory, so clear desc->dev as well. That prevents, for example, i3c_master_unregister_i3c_devs() seeing desc->dev as non-NULL and dereferencing it.
Faiblesse
In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix device_register() error path When device_register() fails in i3c_master_register_new_i3c_devs(), put_device() is called to drop the reference taken by device_register(). That drops the last reference, so the device's release callback i3c_device_release() runs and frees the i3c_device. Two problems follow from that: i3c_device_release() does WARN_ON(i3cdev->desc), so it warns because desc->dev->desc still points back at the descriptor. Clear it before calling put_device(). After put_device() frees the i3c_device, desc->dev is left pointing at freed memory, so clear desc->dev as well. That prevents, for example, i3c_master_unregister_i3c_devs() seeing desc->dev as non-NULL and dereferencing it.
Références
- https://git.kernel.org/stable/c/20a2b6df91fd782ef2ff551febef594d0b46a9a7
- https://git.kernel.org/stable/c/5bf498623f8397d45f85f14cd631c5e5a565c2fb
- https://git.kernel.org/stable/c/6ecf17bf5fe8da51a6e3fc9e03a76898fcc5c6cf
- https://git.kernel.org/stable/c/74be657d98a8d684c0475f3cbd450ef2a30ffc73
- https://git.kernel.org/stable/c/7ef12e1dd06e442eebf370f6e53c41bd056d0f22
- https://git.kernel.org/stable/c/7f8e2c4f3704d9774bb26b49b1ad6a60ae57d4a0
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