In the Linux kernel, the following vulnerability has been resolved: idpf: fix double free and use-after-free in aux device error paths When auxiliary_device_add() fails in idpf_plug_vport_aux_dev() or idpf_plug_core_aux_dev(), the err_aux_dev_add label calls auxiliary_device_uninit() and falls through to err_aux_dev_init. The uninit call will trigger put_device(), which invokes the release callback (idpf_vport_adev_release / idpf_core_adev_release) that frees iadev. The fall-through then reads adev->id from the freed iadev for ida_free() and double-frees iadev with kfree(). Free the IDA slot and clear the back-pointer before uninit, while adev is still valid, then return immediately. Commit 65637c3a1811 ("idpf: fix UAF in RDMA core aux dev deinitialization") fixed the same use-after-free in the matching unplug path in this file but missed both probe error paths.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - idpf: fix double free and use-after-free in aux device error paths When auxiliary_device_add() fails in     idpf_plug_vport_aux_dev() or idpf_plug_core_aux_dev(), the err_aux_dev_add label calls     auxiliary_device_uninit() and falls through to err_aux_dev_init. The uninit call will trigger     put_device(), which invokes the release callback (idpf_vport_adev_release / idpf_core_adev_release) that     frees iadev. The fall-through then reads adev->id from the freed iadev for ida_free() and double-frees     iadev with kfree(). Free the IDA slot and clear the back-pointer before uninit, while adev is still valid,     then return immediately. Commit 65637c3a1811 (idpf: fix UAF in RDMA core aux dev deinitialization) fixed     the same use-after-free in the matching unplug path in this file but missed both probe error paths.
    (CVE-2026-53286)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
329305	openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21388-1)	Nessus	SuSE Local Security Checks	Local	high
323723	Linux Distros Unpatched Vulnerability : CVE-2026-53286	Nessus	Misc.	Local	high

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CVE-2026-53286

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