CVE-2026-43056net: mana: fix use-after-free in add_adev() error path

Official description

In the Linux kernel, the following vulnerability has been resolved: net: mana: fix use-after-free in add_adev() error path If auxiliary_device_add() fails, add_adev() jumps to add_fail and calls auxiliary_device_uninit(adev). The auxiliary device has its release callback set to adev_release(), which frees the containing struct mana_adev. Since adev is embedded in struct mana_adev, the subsequent fall-through to init_fail and access to adev->id may result in a use-after-free. Fix this by saving the allocated auxiliary device id in a local variable before calling auxiliary_device_add(), and use that saved id in the cleanup path after auxiliary_device_uninit().

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815
• https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9
• https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872
• https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe
• https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f