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

  - af_packet: Don't send zero-byte data in tpacket_snd(). syzbot reported a WARNING in __dev_queue_xmit()     triggered via tpacket_snd(): skb_assert_len WARNING: at include/linux/skbuff.h:2753 skb_assert_len     WARNING: at __dev_queue_xmit+0x21bc/0x4970 net/core/dev.c:4781 Call Trace: <TASK> dev_queue_xmit     include/linux/netdevice.h:3448 [inline] packet_xmit+0x243/0x310 net/packet/af_packet.c:276 tpacket_snd     net/packet/af_packet.c:2907 [inline] packet_sendmsg+0x28d6/0x4eb0 net/packet/af_packet.c:3134 When sending     0-byte packets via TPACKET ring buffer on devices with no hard header (e.g. dev->hard_header_len == 0),     tpacket_fill_skb() populates an skb with skb->len == 0 and returns 0. tpacket_snd() then forwards this     empty skb to packet_xmit(), causing __dev_queue_xmit() to hit skb_assert_len(skb). Similar checks exist in     packet_snd() via commit dc633700f00f (net/af_packet: check len when min_header_len equals to 0) and in     packet_sendmsg_spkt() via commit 6a341729fb31 (af_packet: Don't send zero-byte data in     packet_sendmsg_spkt().). Return -EINVAL in tpacket_fill_skb() when skb->len is zero to reject zero-length     packets in tpacket_snd(). (CVE-2026-80742)

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

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Linux Distros Unpatched Vulnerability : CVE-2026-80742

medium Nessus Plugin ID 342757

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.4 Oct 13, 2026, 2:52 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202610130252
Version 1.3 Sep 9, 2026, 2:39 AM CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C") Detection (updated detection logic) Plugin metadata Plugin Feed: 202609090239
Version 1.2 Sep 5, 2026, 1:14 PM CVSS metrics ("CVSSv2 score" set to 7.8) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:A/AC:L/Au:N/C:N/I:C/A:C") CVSS metrics ("CVSSv3 score" set to 5.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H") CVSSv3 severity (based on None, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202609051314
Version 1.1 Sep 4, 2026, 12:58 PM New Plugin Feed: 202609041258