In the Linux kernel, the following vulnerability has been resolved: virtio: fix use-after-free in unregister_virtio_device() device_unregister() is device_del() plus put_device(). When the caller holds no extra reference, that drops the last one and runs the release callback, which for several transports frees the memory the embedded struct virtio_device sits in. unregister_virtio_device() then calls virtio_debug_device_exit(), which reads dev->debugfs_dir out of the freed object. Affected transports are the ones whose release callback frees and whose remove path takes no reference: virtio_mmio, virtio_vdpa, virtio_uml, mlxbf-tmfifo and virtio_ccw. virtio_pci is unaffected because virtio_pci_remove() brackets the call with get_device() and put_device(). Remove the debugfs entries before the device can go away. They are only accessed through the protected debugfs interface, so debugfs_remove_recursive() waits for in-progress file operations before returning. Tearing them down while the device is still alive is therefore safe. Reproduced on User-Mode Linux with CONFIG_KASAN and CONFIG_VIRTIO_DEBUG by unbinding a virtio-uml device: BUG: KASAN: slab-use-after-free in virtio_debug_device_exit+0x36/0x4d Read of size 8 at addr 00000000616e0b10 by task init/1 __asan_report_load8_noabort virtio_debug_device_exit+0x36/0x4d unregister_virtio_device+0x48/0x75 virtio_uml_remove platform_remove device_release_driver_internal unbind_store Freed by task 1: kfree virtio_uml_release_dev device_release kobject_put put_device device_unregister With this applied, the report is gone and unbind is clean.

An update of the linux package has been released.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In the Linux kernel, the following vulnerability has been resolved: virtio: fix use-after-free in
    unregister_virtio_device() device_unregister() is device_del() plus put_device(). When the caller holds no
    extra reference, that drops the last one and runs the release callback, which for several transports frees
    the memory the embedded struct virtio_device sits in. unregister_virtio_device() then calls
    virtio_debug_device_exit(), which reads dev->debugfs_dir out of the freed object. Affected transports are
    the ones whose release callback frees and whose remove path takes no reference: virtio_mmio, virtio_vdpa,
    virtio_uml, mlxbf-tmfifo and virtio_ccw. virtio_pci is unaffected because virtio_pci_remove() brackets the
    call with get_device() and put_device(). Remove the debugfs entries before the device can go away. They
    are only accessed through the protected debugfs interface, so debugfs_remove_recursive() waits for in-
    progress file operations before returning. Tearing them down while the device is still alive is therefore
    safe. Reproduced on User-Mode Linux with CONFIG_KASAN and CONFIG_VIRTIO_DEBUG by unbinding a virtio-uml
    device: BUG: KASAN: slab-use-after-free in virtio_debug_device_exit+0x36/0x4d Read of size 8 at addr
    00000000616e0b10 by task init/1 __asan_report_load8_noabort virtio_debug_device_exit+0x36/0x4d
    unregister_virtio_device+0x48/0x75 virtio_uml_remove platform_remove device_release_driver_internal
    unbind_store Freed by task 1: kfree virtio_uml_release_dev device_release kobject_put put_device
    device_unregister With this applied, the report is gone and unbind is clean. (CVE-2026-97996)

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

  - In the Linux kernel, the following vulnerability has been resolved: virtio: fix use-after-free in     unregister_virtio_device() device_unregister() is device_del() plus put_device(). When the caller holds no     extra reference, that drops the last one and runs the release callback, which for several transports frees     the memory the embedded struct virtio_device sits in. unregister_virtio_device() then calls     virtio_debug_device_exit(), which reads dev->debugfs_dir out of the freed object. Affected transports are     the ones whose release callback frees and whose remove path takes no reference: virtio_mmio, virtio_vdpa,     virtio_uml, mlxbf-tmfifo and virtio_ccw. virtio_pci is unaffected because virtio_pci_remove() brackets the     call with get_device() and put_device(). Remove the debugfs entries before the device can go away. They     are only accessed through the protected debugfs interface, so debugfs_remove_recursive() waits for in-     progress file operations before returning. Tearing them down while the device is still alive is therefore     safe. Reproduced on User-Mode Linux with CONFIG_KASAN and CONFIG_VIRTIO_DEBUG by unbinding a virtio-uml     device: BUG: KASAN: slab-use-after-free in virtio_debug_device_exit+0x36/0x4d Read of size 8 at addr     00000000616e0b10 by task init/1 __asan_report_load8_noabort virtio_debug_device_exit+0x36/0x4d     unregister_virtio_device+0x48/0x75 virtio_uml_remove platform_remove device_release_driver_internal     unbind_store Freed by task 1: kfree virtio_uml_release_dev device_release kobject_put put_device     device_unregister With this applied, the report is gone and unbind is clean. (CVE-2026-97996)

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

ID	Name	Product	Family	Type	Severity
376443	Ubuntu 24.04 LTS / 26.04 LTS : Linux kernel vulnerabilities (USN-8959-1)	Nessus	Ubuntu Local Security Checks	Local	high
375113	Photon OS 5.0: Linux PHSA-2026-5.0-91-1014	Nessus	PhotonOS Local Security Checks	Local	high
375014	Photon OS 5.0: Linux PHSA-2026-5.0-92-1014	Nessus	PhotonOS Local Security Checks	Local	high
475612	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.106	Tenable Cloud Security	Google COS Security Checks	Local	high
475612	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.106	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
364137	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-500374)	Nessus	Oracle Linux Local Security Checks	Local	high
362907	Debian dla-4817 : ata-modules-6.12.107+deb12-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
351155	Debian dsa-6528 : ata-modules-6.12.111+deb13-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
350620	Linux Distros Unpatched Vulnerability : CVE-2026-97996	Nessus	Misc.	Local	high

Detections

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CVE-2026-97996

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Tenable Plugins

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