In the Linux kernel, the following vulnerability has been resolved: net:sfc: fix non-freed irq in legacy irq mode SFC driver can be configured via modparam to work using MSI-X, MSI or legacy IRQ interrupts. In the last one, the interrupt was not properly released on module remove. It was not freed because the flag irqs_hooked was not set during initialization in the case of using legacy IRQ. Example of (trimmed) trace during module remove without this fix: remove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1' WARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170 ...trimmed... Call Trace: unregister_irq_proc+0xe3/0x100 free_desc+0x29/0x70 irq_free_descs+0x47/0x70 mp_unmap_irq+0x58/0x60 acpi_unregister_gsi_ioapic+0x2a/0x40 acpi_pci_irq_disable+0x78/0xb0 pci_disable_device+0xd1/0x100 efx_pci_remove+0xa1/0x1e0 [sfc] pci_device_remove+0x38/0xa0 __device_release_driver+0x177/0x230 driver_detach+0xcb/0x110 bus_remove_driver+0x58/0xd0 pci_unregister_driver+0x2a/0xb0 efx_exit_module+0x24/0xf40 [sfc] __do_sys_delete_module.constprop.0+0x171/0x280 ? exit_to_user_mode_prepare+0x83/0x1d0 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f9385800b ...trimmed...

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989935 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    net:sfc: fix non-freed irq in legacy irq mode

    SFC driver can be configured via modparam to work using MSI-X, MSI or     legacy IRQ interrupts. In the last one, the interrupt was not properly     released on module remove.

    It was not freed because the flag irqs_hooked was not set during     initialization in the case of using legacy IRQ.

    Example of (trimmed) trace during module remove without this fix:

    remove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1'     WARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170     ...trimmed...
    Call Trace:
     unregister_irq_proc+0xe3/0x100      free_desc+0x29/0x70      irq_free_descs+0x47/0x70      mp_unmap_irq+0x58/0x60      acpi_unregister_gsi_ioapic+0x2a/0x40      acpi_pci_irq_disable+0x78/0xb0      pci_disable_device+0xd1/0x100      efx_pci_remove+0xa1/0x1e0 [sfc]      pci_device_remove+0x38/0xa0
     __device_release_driver+0x177/0x230      driver_detach+0xcb/0x110      bus_remove_driver+0x58/0xd0      pci_unregister_driver+0x2a/0xb0      efx_exit_module+0x24/0xf40 [sfc]
     __do_sys_delete_module.constprop.0+0x171/0x280      ? exit_to_user_mode_prepare+0x83/0x1d0      do_syscall_64+0x3d/0x80      entry_SYSCALL_64_after_hwframe+0x44/0xae     RIP: 0033:0x7f9f9385800b     ...trimmed...

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-986701 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    net:sfc: fix non-freed irq in legacy irq mode

    SFC driver can be configured via modparam to work using MSI-X, MSI or     legacy IRQ interrupts. In the last one, the interrupt was not properly     released on module remove.

    It was not freed because the flag irqs_hooked was not set during     initialization in the case of using legacy IRQ.

    Example of (trimmed) trace during module remove without this fix:

    remove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1'     WARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170     ...trimmed...
    Call Trace:
     unregister_irq_proc+0xe3/0x100      free_desc+0x29/0x70      irq_free_descs+0x47/0x70      mp_unmap_irq+0x58/0x60      acpi_unregister_gsi_ioapic+0x2a/0x40      acpi_pci_irq_disable+0x78/0xb0      pci_disable_device+0xd1/0x100      efx_pci_remove+0xa1/0x1e0 [sfc]      pci_device_remove+0x38/0xa0
     __device_release_driver+0x177/0x230      driver_detach+0xcb/0x110      bus_remove_driver+0x58/0xd0      pci_unregister_driver+0x2a/0xb0      efx_exit_module+0x24/0xf40 [sfc]
     __do_sys_delete_module.constprop.0+0x171/0x280      ? exit_to_user_mode_prepare+0x83/0x1d0      do_syscall_64+0x3d/0x80      entry_SYSCALL_64_after_hwframe+0x44/0xae     RIP: 0033:0x7f9f9385800b     ...trimmed...

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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

  - net:sfc: fix non-freed irq in legacy irq mode SFC driver can be configured via modparam to work using     MSI-X, MSI or legacy IRQ interrupts. In the last one, the interrupt was not properly released on module     remove. It was not freed because the flag irqs_hooked was not set during initialization in the case of     using legacy IRQ. Example of (trimmed) trace during module remove without this fix: remove_proc_entry:
    removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1' WARNING: CPU: 39 PID: 3658 at     fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170 ...trimmed... Call Trace:
    unregister_irq_proc+0xe3/0x100 free_desc+0x29/0x70 irq_free_descs+0x47/0x70 mp_unmap_irq+0x58/0x60     acpi_unregister_gsi_ioapic+0x2a/0x40 acpi_pci_irq_disable+0x78/0xb0 pci_disable_device+0xd1/0x100     efx_pci_remove+0xa1/0x1e0 [sfc] pci_device_remove+0x38/0xa0 __device_release_driver+0x177/0x230     driver_detach+0xcb/0x110 bus_remove_driver+0x58/0xd0 pci_unregister_driver+0x2a/0xb0     efx_exit_module+0x24/0xf40 [sfc] __do_sys_delete_module.constprop.0+0x171/0x280 ?     exit_to_user_mode_prepare+0x83/0x1d0 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP:
    0033:0x7f9f9385800b ...trimmed... (CVE-2021-47283)

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

ID	Name	Product	Family	Severity
273837	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989935)	Nessus	Unity Linux Local Security Checks	medium
268616	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986701)	Nessus	Unity Linux Local Security Checks	medium
229853	Linux Distros Unpatched Vulnerability : CVE-2021-47283	Nessus	Misc.	medium

Detections

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CVE-2021-47283

medium

Tenable Plugins

medium

medium

medium