The ICMPv6 parser in tcpdump before 4.9.2 has a buffer over-read in print-icmp6.c:icmp6_print().
{
"source": [
"CPE_RANGE",
"REFERENCES"
],
"cpe": "cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "4.9.1"
}
]
}"2026-07-08T11:47:57Z"
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-13021.json"
[
{
"id": "CVE-2017-13021-52f0872e",
"digest": {
"line_hashes": [
"83582845347540620492194701955985557803",
"177568430537303103527377166793235341145",
"319599135815728648978403099529769882750",
"328919621073038910447855633331647472840"
],
"threshold": 0.9
},
"signature_version": "v1",
"signature_type": "Line",
"source": "https://github.com/the-tcpdump-group/tcpdump/commit/67c7126062d59729cd421bb38f9594015c9907ba",
"deprecated": false,
"target": {
"file": "print-icmp6.c"
}
},
{
"id": "CVE-2017-13021-fd286838",
"digest": {
"function_hash": "88042001857164022284303757811042837602",
"length": 8138.0
},
"signature_version": "v1",
"signature_type": "Function",
"source": "https://github.com/the-tcpdump-group/tcpdump/commit/67c7126062d59729cd421bb38f9594015c9907ba",
"deprecated": false,
"target": {
"function": "icmp6_print",
"file": "print-icmp6.c"
}
}
]