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

  - fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-after-free dlfb_ops_mmap() uses remap_pfn_range()     to map vmalloc framebuffer pages to userspace but sets no vm_ops on the VMA. This means the kernel cannot     track active mmaps. When dlfb_realloc_framebuffer() replaces the backing buffer via FBIOPUT_VSCREENINFO,     existing mmap PTEs are not invalidated. On USB disconnect, dlfb_ops_destroy() calls vfree() on the old     pages while userspace PTEs still reference them, resulting in a use-after-free: the process retains     read/write access to freed kernel pages. Add vm_operations_struct with open/close callbacks that maintain     an atomic mmap_count on struct dlfb_data. In dlfb_realloc_framebuffer(), check mmap_count and return
    -EBUSY if the buffer is currently mapped, preventing buffer replacement while userspace holds stale PTEs.
    Tested with PoC using dummy_hcd + raw_gadget USB device emulation. (CVE-2026-43497)

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

Detections

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Linux Distros Unpatched Vulnerability : CVE-2026-43497

high Nessus Plugin ID 316503

Version 1.5

Version 1.3

Version 1.2

Version 1.5 Jun 23, 2026, 12:13 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202606230013
Version 1.3 May 29, 2026, 5:27 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202605291727
Version 1.2 May 25, 2026, 10:30 PM CVSS metrics ("CVSSv2 score" set to 7.2) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C") CVSS metrics ("CVSSv3 score" set to 7.8) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H") Detection (updated detection logic) Plugin metadata Plugin Feed: 202605252230