Vulnerability-Lookup

OESA-2026-2357 (CVE-2026-29004)

Vulnerability from osv_openeuler – Published: 2026-05-15 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

busybox security update

Details

The Swiss Army Knife of Embedded Linux

Security Fix(es):

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.(CVE-2026-29004)

Severity

8.1 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-29004	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "busybox-help-1.36.1-16.oe2403sp3.noarch.rpm"
        ],
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          "busybox-1.36.1-16.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "busybox-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.36.1-16.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-1.31.1-30.oe2003sp4.aarch64.rpm",
          "busybox-debuginfo-1.31.1-30.oe2003sp4.aarch64.rpm",
          "busybox-debugsource-1.31.1-30.oe2003sp4.aarch64.rpm",
          "busybox-help-1.31.1-30.oe2003sp4.aarch64.rpm",
          "busybox-petitboot-1.31.1-30.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "busybox-1.31.1-30.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "busybox-1.31.1-30.oe2003sp4.x86_64.rpm",
          "busybox-debuginfo-1.31.1-30.oe2003sp4.x86_64.rpm",
          "busybox-debugsource-1.31.1-30.oe2003sp4.x86_64.rpm",
          "busybox-help-1.31.1-30.oe2003sp4.x86_64.rpm",
          "busybox-petitboot-1.31.1-30.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.31.1-30.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-1.34.1-30.oe2203sp4.aarch64.rpm",
          "busybox-debuginfo-1.34.1-30.oe2203sp4.aarch64.rpm",
          "busybox-debugsource-1.34.1-30.oe2203sp4.aarch64.rpm",
          "busybox-help-1.34.1-30.oe2203sp4.aarch64.rpm",
          "busybox-petitboot-1.34.1-30.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "busybox-1.34.1-30.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "busybox-1.34.1-30.oe2203sp4.x86_64.rpm",
          "busybox-debuginfo-1.34.1-30.oe2203sp4.x86_64.rpm",
          "busybox-debugsource-1.34.1-30.oe2203sp4.x86_64.rpm",
          "busybox-help-1.34.1-30.oe2203sp4.x86_64.rpm",
          "busybox-petitboot-1.34.1-30.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.34.1-30.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp3.aarch64.rpm",
          "busybox-1.36.1-16.oe2403.aarch64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403.aarch64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403.aarch64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403.aarch64.rpm",
          "busybox-1.36.1-16.oe2403sp1.aarch64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp1.aarch64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp1.aarch64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "busybox-help-1.36.1-16.oe2403sp3.noarch.rpm",
          "busybox-help-1.36.1-16.oe2403.noarch.rpm",
          "busybox-help-1.36.1-16.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "busybox-1.36.1-16.oe2403sp3.src.rpm",
          "busybox-1.36.1-16.oe2403.src.rpm",
          "busybox-1.36.1-16.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "busybox-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp3.x86_64.rpm",
          "busybox-1.36.1-16.oe2403.x86_64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403.x86_64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403.x86_64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403.x86_64.rpm",
          "busybox-1.36.1-16.oe2403sp1.x86_64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp1.x86_64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp1.x86_64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.36.1-16.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-1.36.1-16.oe2403sp1.aarch64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp1.aarch64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp1.aarch64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "busybox-help-1.36.1-16.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "busybox-1.36.1-16.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "busybox-1.36.1-16.oe2403sp1.x86_64.rpm",
          "busybox-debuginfo-1.36.1-16.oe2403sp1.x86_64.rpm",
          "busybox-debugsource-1.36.1-16.oe2403sp1.x86_64.rpm",
          "busybox-petitboot-1.36.1-16.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
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          "events": [
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            },
            {
              "fixed": "1.36.1-16.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The Swiss Army Knife of Embedded Linux\r\n\r\nSecurity Fix(es):\n\nBusyBox 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.(CVE-2026-29004)",
  "id": "OESA-2026-2357",
  "modified": "2026-08-06T11:11:19Z",
  "published": "2026-05-15T11:11:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2357"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29004"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "busybox security update",
  "upstream": [
    "CVE-2026-29004"
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-04 18:05 – Updated: 2026-07-15 01:10 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 · CISA-ADP (v2.0.3)

Decision recorded 2026-05-06 13:46 UTC

CWE

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

Assigner

VulnCheck mitre root

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	Unaffected: 1.37.0-7.3.hum1 , < * (rpm) 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": [
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                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-06T13:46:25.578532Z",
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        "workarounds": [
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            "lang": "en",
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            "exploitMaturity": "NOT_DEFINED",
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          "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": "2026-07-15T01:10:52.483Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-2357 (CVE-2026-29004)

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

Tags

Sightings

Nomenclature

Related by attack behaviour