Vulnerability-Lookup

ubuntu-cve-2026-29004

Vulnerability from osv_ubuntu

Published

2026-05-04 18:16

Modified

2026-06-30 16:19

Summary

Details

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.

Severity

8.1 (High)


                    
                      CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

8.8 (High)


                    
                      CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.2 (High)


                    
                      CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-29004	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-29004	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.21.0-1ubuntu1.4+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.20.0-8.1ubuntu1",
        "1:1.20.0-9ubuntu1",
        "1:1.20.0-9ubuntu2",
        "1:1.21.0-1ubuntu1",
        "1:1.21.0-1ubuntu1.4",
        "1:1.21.0-1ubuntu1.4+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.22.0-15ubuntu1.4+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.22.0-15ubuntu1",
        "1:1.22.0-15ubuntu1.4",
        "1:1.22.0-15ubuntu1.4+esm1",
        "1:1.22.0-15ubuntu1.4+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.27.2-2ubuntu3.4+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.22.0-19ubuntu2",
        "1:1.27.2-1ubuntu3",
        "1:1.27.2-1ubuntu4",
        "1:1.27.2-2ubuntu2",
        "1:1.27.2-2ubuntu3",
        "1:1.27.2-2ubuntu3.1",
        "1:1.27.2-2ubuntu3.2",
        "1:1.27.2-2ubuntu3.3",
        "1:1.27.2-2ubuntu3.4",
        "1:1.27.2-2ubuntu3.4+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-4ubuntu6.5"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-4ubuntu6.5"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-4ubuntu6.5"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-4ubuntu6.5"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-4ubuntu6.5"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-4ubuntu6.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.30.1-4ubuntu6.5?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.30.1-4ubuntu4",
        "1:1.30.1-4ubuntu5",
        "1:1.30.1-4ubuntu6",
        "1:1.30.1-4ubuntu6.1",
        "1:1.30.1-4ubuntu6.2",
        "1:1.30.1-4ubuntu6.3",
        "1:1.30.1-4ubuntu6.4",
        "1:1.30.1-4ubuntu6.5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-7ubuntu3.1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-7ubuntu3.1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-7ubuntu3.1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-7ubuntu3.1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-7ubuntu3.1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-7ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.30.1-7ubuntu3.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.30.1-6ubuntu3",
        "1:1.30.1-7ubuntu1",
        "1:1.30.1-7ubuntu2",
        "1:1.30.1-7ubuntu3",
        "1:1.30.1-7ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.36.1-6ubuntu3.1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.36.1-6ubuntu3.1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.36.1-6ubuntu3.1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.36.1-6ubuntu3.1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.36.1-6ubuntu3.1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.36.1-6ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.36.1-6ubuntu3.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.36.1-3ubuntu1",
        "1:1.36.1-6ubuntu1",
        "1:1.36.1-6ubuntu3",
        "1:1.36.1-6ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.37.0-4ubuntu1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.37.0-4ubuntu1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.37.0-4ubuntu1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.37.0-4ubuntu1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.37.0-4ubuntu1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.37.0-4ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.37.0-4ubuntu1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.37.0-4ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.37.0-7ubuntu1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.37.0-7ubuntu1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.37.0-7ubuntu1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.37.0-7ubuntu1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.37.0-7ubuntu1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.37.0-7ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.37.0-7ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.37.0-4ubuntu1",
        "1:1.37.0-7ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.",
  "id": "UBUNTU-CVE-2026-29004",
  "modified": "2026-06-30T16:19:41Z",
  "published": "2026-05-04T18:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-29004"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-29004"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-29004"
  ]
}

CVE-2026-29004 (GCVE-0-2026-29004)

Vulnerability from cvelistv5 – Published: 2026-05-04 18:05 – Updated: 2026-06-30 12:07 X_Open Source

Title

BusyBox DHCPv6 Client Heap Buffer Overflow via DNS_SERVERS

Summary

Severity

7.2 (High)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

8.1 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-131 - Incorrect Calculation of Buffer Size

Assigner

VulnCheck

References

9 references

URL	Tags
https://y637f9qq2x.com/posts/busybox-dhcpv6-heap-…	technical-descriptionexploit
https://github.com/vda-linux/busybox_mirror/commi…	patch
https://github.com/vda-linux/busybox_mirror/commi…	patch
https://busybox.net/	product
https://www.vulncheck.com/advisories/busybox-dhcp…	third-party-advisory
https://access.redhat.com/security/cve/CVE-2026-29004	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2466526	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:30652	vendor-advisoryx_refsource_REDHAT

Impacted products

3 products

Vendor	Product	Version
vda-linux	busybox_mirror	Affected: 0 , < 42202bfb1e6ac51fa995beda8be4d7b654aeee2a (git)
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6

Date Public

2026-03-12 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-29004",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-06T13:46:25.578532Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-06T13:46:42.699Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/a:redhat:hummingbird:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Hardened Images",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-05-04T18:05:18.962Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in BusyBox. A heap buffer overflow vulnerability exists in the Dynamic Host Configuration Protocol version 6 (DHCPv6) client, specifically within the `option_to_env()` function. Network-adjacent attackers can exploit this by sending a crafted DHCPv6 response containing a malformed D6_OPT_DNS_SERVERS option. This can lead to memory corruption, potentially allowing for arbitrary code execution or denial of service on affected embedded systems lacking heap hardening."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-131",
                "description": "Incorrect Calculation of Buffer Size",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T12:07:54.385Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-29004"
          },
          {
            "name": "RHBZ#2466526",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466526"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29004.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:30652"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:30652: Red Hat Hardened Images"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-04T19:03:24.638Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-05-04T18:05:18.962Z",
            "value": "Made public."
          }
        ],
        "title": "BusyBox: BusyBox: Arbitrary Code Execution via DHCPv6 Client Heap Buffer Overflow",
        "workarounds": [
          {
            "lang": "en",
            "value": "To mitigate this vulnerability, restrict network access to systems running BusyBox as a DHCPv6 client, ensuring that only trusted DHCPv6 servers can communicate with it. If the DHCPv6 client functionality is not essential for the system\u0027s operation, consider disabling the `udhcpc6` service or configuring it to only accept responses from known, trusted sources. Consult product-specific documentation for details on managing network services and configurations. Any changes to network service configurations may require a service restart to take effect, potentially impacting network connectivity."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "busybox_mirror",
          "vendor": "vda-linux",
          "versions": [
            {
              "lessThan": "42202bfb1e6ac51fa995beda8be4d7b654aeee2a",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc."
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "VulnCheck"
        }
      ],
      "datePublic": "2026-03-12T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T13:07:29.996Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://y637f9qq2x.com/posts/busybox-dhcpv6-heap-overflow/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/vda-linux/busybox_mirror/commit/42202bfb1e6ac51fa995beda8be4d7b654aeee2a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://busybox.net/"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/busybox-dhcpv6-client-heap-buffer-overflow-via-dns-servers"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "BusyBox DHCPv6 Client Heap Buffer Overflow via DNS_SERVERS",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-29004",
    "datePublished": "2026-05-04T18:05:18.962Z",
    "dateReserved": "2026-03-03T16:42:01.012Z",
    "dateUpdated": "2026-06-30T12:07:54.385Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2026-29004

Vulnerability from osv_ubuntu

CVE-2026-29004 (GCVE-0-2026-29004)

Tags

Sightings

Nomenclature