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Predictable and reused DHCPv4 transaction identifier allows spoofed DHCP replies to reconfigure gateway and DNS

Exact source revision recorded 23 Oct 2026 20:48:20 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-79980

Published

zephyr

https://github.com/zephyrproject-rtos/zephyr

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "zephyrproject",
                    "product": "zephyr",
                    "collectionURL": "https://github.com/zephyrproject-rtos/zephyr",
                    "packageName": "zephyr",
                    "defaultStatus": "unaffected",
                    "programFiles": [
                        "subsys/net/ip/dhcpv4.c",
                        "subsys/net/lib/dhcpv4/dhcpv4.c"
                    ],
                    "programRoutines": [
                        {
                            "name": "dhcpv4_enter_rebinding"
                        },
                        {
                            "name": "dhcpv4_enter_renewing"
                        },
                        {
                            "name": "dhcpv4_send_decline"
                        },
                        {
                            "name": "dhcpv4_send_discover"
                        },
                        {
                            "name": "dhcpv4_send_request"
                        },
                        {
                            "name": "dhcpv4_start_internal"
                        },
                        {
                            "name": "net_dhcpv4_input"
                        }
                    ],
                    "versions": [
                        {
                            "version": "1.7.0",
                            "status": "affected",
                            "lessThan": "4.5.0",
                            "versionType": "semver"
                        }
                    ]
                }
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Sources read 27 Oct 16:49 UTC · 271 of 272 readable · 269 fully read · documentation 469/469 current