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

  - ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options This patch restricts setting Loose Source and Record     Route (LSRR) and Strict Source and Record Route (SSRR) IP options to users with CAP_NET_RAW capability.
    This prevents unprivileged applications from forcing packets to route through attacker-controlled nodes to     leak TCP ISN and possibly other protocol information. While LSRR and SSRR are commonly filtered in many     network environments, they may still be supported and forwarded along some network paths. RFC 7126     (Recommendations on Filtering of IPv4 Packets Containing IPv4 Options) recommend to drop these options in     4.3 and 4.4. (CVE-2026-53249)

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-2026-53249

medium Nessus Plugin ID 323464

Version 1.16