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

  - openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate     a fixed-size skb with nlmsg_new(NLMSG_DEFAULT_SIZE, ...) but serialize the full upcall PID array via     ovs_vport_get_upcall_portids(). Since ovs_vport_set_upcall_portids() accepts any non-zero multiple of     sizeof(u32) with no upper bound, a CAP_NET_ADMIN user can install a PID array large enough to overflow the     reply buffer, causing nla_put() to fail with -EMSGSIZE and hitting BUG_ON(err < 0). On systems with     unprivileged user namespaces enabled (e.g., Ubuntu default), this is reachable via unshare -Urn since OVS     vport mutation operations use GENL_UNS_ADMIN_PERM. kernel BUG at net/openvswitch/datapath.c:2414! Oops:
    invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 65 Comm: poc Not tainted     7.0.0-rc7-00195-geb216e422044 #1 RIP: 0010:ovs_vport_cmd_set+0x34c/0x400 Call Trace: <TASK>     genl_family_rcv_msg_doit (net/netlink/genetlink.c:1116) genl_rcv_msg (net/netlink/genetlink.c:1194)     netlink_rcv_skb (net/netlink/af_netlink.c:2550) genl_rcv (net/netlink/genetlink.c:1219) netlink_unicast     (net/netlink/af_netlink.c:1344) netlink_sendmsg (net/netlink/af_netlink.c:1894) __sys_sendto     (net/socket.c:2206) __x64_sys_sendto (net/socket.c:2209) do_syscall_64 (arch/x86/entry/syscall_64.c:63)     entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> Kernel panic - not syncing: Fatal     exception Reject attempts to set more PIDs than nr_cpu_ids in ovs_vport_set_upcall_portids(), and pre-     compute the worst-case reply size in ovs_vport_cmd_msg_size() based on that bound, similar to the existing     ovs_dp_cmd_msg_size(). nr_cpu_ids matches the cap already used by the per-CPU dispatch configuration on     the datapath side (ovs_dp_cmd_fill_info() serialises at most nr_cpu_ids PIDs), so the two sides stay     consistent. (CVE-2026-45840)

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

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Linux Distros Unpatched Vulnerability : CVE-2026-45840

medium Nessus Plugin ID 317080

Version 1.5

Version 1.4

Version 1.3

Version 1.1

Version 1.5 Jun 23, 2026, 12:13 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202606230013
Version 1.4 Jun 21, 2026, 6:24 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202606211824
Version 1.3 Jun 9, 2026, 4:51 AM 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: 202606090451
Version 1.1 May 29, 2026, 5:27 PM New Plugin Feed: 202605291727