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CVE-2026-43056 is a use-after-free vulnerability in the Linux kernel net/mana component, specifically in the add_adev() error path. When auxiliary_device_add() fails, add_adev() transitions to cleanup logic that calls auxiliary_device_uninit() on an embedded auxiliary device object. That uninitialization invokes the configured release callback, adev_release(), which frees the containing struct mana_adev. Because the auxiliary device structure is embedded within struct mana_adev, subsequent fall-through cleanup code that accesses adev->id dereferences memory that may already have been freed. The upstream fix preserves the allocated auxiliary device identifier in a local variable before calling auxiliary_device_add(), and then uses that saved value during cleanup instead of reading from the freed embedded object.
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A Linux kernel use-after-free vulnerability in the net/mana component's add_adev() error path.
A Linux kernel use-after-free vulnerability in net/mana in the add_adev() error path.
A Linux kernel use-after-free vulnerability in the net/mana add_adev() error path.
A use-after-free vulnerability in the Linux kernel net/mana component's add_adev() error path, triggered when auxiliary_device_add() fails and cleanup accesses an embedded auxiliary device after it has been freed.
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