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

  - In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized     nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16.
    Commit a1e64addf3ff (net: openvswitch: remove misbehaving actions length check) allowed the total     sw_flow_actions stream to grow beyond 64 KiB, which is valid, but also removed the last guard preventing a     generated nested action attribute from exceeding U16_MAX. An oversized generated container can thus be     closed with a truncated nla_len. A later dump or teardown then walks a structurally different stream than     the one that was validated. In particular, an oversized nested CLONE/CT action may cause subsequent bytes     in the generated stream to be interpreted as independent actions. Keep the larger total-action-stream     behavior, but make nested action close reject generated containers that do not fit in nla_len, and return     the error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and CHECK_PKT_LEN builders, trim     resource-owning action-list tails in reverse construction order before discarding failed wrappers, so     resources copied into the rejected tails are released before the wrappers are removed. Most failed outer     wrappers are discarded by truncating actions_len after child resources have been released. CHECK_PKT_LEN     also trims its parent after branch resources are gone. SET/TUNNEL close failures unwind their known     tun_dst ownership directly, and SET_TO_MASKED has no external ownership and truncates on close failure.
    (CVE-2026-64531)

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Linux Distros Unpatched Vulnerability : CVE-2026-64531

high Nessus Plugin ID 330131

Version 1.42