{"schemaVersion":3,"id":"CVE-2026-5265","aliases":["UBUNTU-CVE-2026-5265","DEBIAN-CVE-2026-5265"],"status":"published","duplicateOf":null,"title":null,"description":"When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. 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