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

  - Time-of-check Time-of-use (TOCTOU) race condition vulnerability in Erlang/OTP ssl (dtls_packet_demux     module) allows an unauthenticated remote attacker to crash all active DTLS sessions on a listener. A DTLS     server listener uses a single shared dtls_packet_demux gen_server process to route incoming UDP datagrams     to the correct connection handler. When a DTLS client reconnects rapidly from the same source address and     port (sending multiple ClientHello messages in quick succession), a race condition in the demux's internal     gb_trees key-value store causes a {key_exists, {old, Client}} crash, terminating the demux process.
    Because the demux is shared across all DTLS associations on that listener, its crash immediately kills     every active DTLS session, not just the attacker's. The attack is pre-authentication: the attacker only     needs to send UDP datagrams containing valid ClientHello messages from the same source IP and port before     the intermediate DOWN monitor message is processed by the gen_server. No credentials, no completed     handshake, and no special configuration are required, and the crash can be repeated indefinitely to create     a persistent denial of service for all clients of that listener. This vulnerability is associated with     program file lib/ssl/src/dtls_packet_demux.erl. This issue affects OTP from OTP 25.3 before OTP 29.0.3,     OTP 28.5.0.3 and OTP 27.3.4.14, corresponding to ssl from 10.9 before 11.7.3, 11.6.0.3 and 11.2.12.10.
    (CVE-2026-55950)

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Linux Distros Unpatched Vulnerability : CVE-2026-55950

high Nessus Plugin ID 324945

Version 1.4

Version 1.3

Version 1.2

Version 1.4 Jul 25, 2026, 1:06 PM CVSS metrics ("CVSSv2 score" set to 4.3) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P") Detection (updated detection logic) Plugin metadata Plugin Feed: 202607251306
Version 1.3 Jul 8, 2026, 11:53 AM CVSS metrics ("CVSSv2 score" set to 5.4) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C") Plugin Feed: 202607081153
Version 1.2 Jul 4, 2026, 4:43 PM Detection (updated detection logic) New Plugin metadata Plugin Feed: 202607041643