Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - 已解決 Linux 核心中的下列弱點：tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() Sashiko found that iptunnel_pmtud_build_icmp() and iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr() before an skb_cow() call which can reallocate skb->head. Fix this possible UAF by initializing the local variables after the skb_cow() call.
    Remove skb_reset_network_header() calls which were not needed. (CVE-2026-63994)

請注意，Nessus 依賴供應商報告的套件存在。

偵測

Linux Distros 未修補弱點：CVE-2026-63994

critical Nessus Plugin ID 328204

版本 1.16