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

  - usbnet: gl620a: fix out-of-bounds read in genelink_rx_fixup() genelink_rx_fixup() splits an aggregated RX     frame into its individual packets, using a per-packet length taken from device-supplied data. That length     is only bounded by GL_MAX_PACKET_LEN (1514); it is never compared against how many bytes were actually     received. A malicious GeneLink (GL620A) device can therefore send a short URB whose header claims     packet_count > 1 and a first packet of up to 1514 bytes. skb_put_data(gl_skb, packet->packet_data, size);
    then copies past the end of the receive buffer and hands the adjacent slab contents up the network stack,     an out-of-bounds read that leaks kernel heap. No privilege is required: the path runs in the usbnet RX     softirq as soon as the interface is up. BUG: KASAN: slab-out-of-bounds in genelink_rx_fixup     (drivers/net/usb/gl620a.c:112) Read of size 1514 at addr ffff888011309708 by task ksoftirqd/0/14 Call     Trace: ... __asan_memcpy (mm/kasan/shadow.c:105) genelink_rx_fixup (include/linux/skbuff.h:2814     drivers/net/usb/gl620a.c:112) usbnet_bh (drivers/net/usb/usbnet.c:572 drivers/net/usb/usbnet.c:1589)     process_one_work (kernel/workqueue.c:3322) bh_worker (kernel/workqueue.c:3405) tasklet_action     (kernel/softirq.c:965) handle_softirqs (kernel/softirq.c:622) run_ksoftirqd (kernel/softirq.c:1076) ...
    skb_pull() already verifies that the requested length fits the buffer and returns NULL otherwise. Move it     ahead of the copy and check its result, so a packet that overruns the received data is rejected before it     is read. Well-formed frames, whose packets are fully present, are unaffected. (CVE-2026-64540)

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-2026-64540

high Nessus Plugin ID 330220

Version 1.2

Version 1.1

Version 1.2 Jul 29, 2026, 12:29 AM CVSS metrics ("CVSSv2 score" set to 6.6) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C") CVSS metrics ("CVSSv3 score" set to 7.1) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H") CVSSv2 severity (based on CVE-2026-64540, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202607290029
Version 1.1 Jul 28, 2026, 1:30 PM New Plugin Feed: 202607281330