RHSA-2026:30652

Vulnerability from csaf_redhat - Published: 2026-06-28 15:24 - Updated: 2026-09-06 04:58
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: busybox: * busybox-1.37.0-7.3.hum1 (aarch64, x86_64) * busybox-petitboot-1.37.0-7.3.hum1 (aarch64, x86_64) * busybox-shared-1.37.0-7.3.hum1 (aarch64, x86_64) * busybox-1.37.0-7.3.hum1.src (src) Security Fix(es): busybox: * CVE-2026-29004
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-29004

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.

8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-131 - Incorrect Calculation of Buffer Size
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:busybox-main@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:busybox-main@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:busybox-main@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Important
References
To clipboard 

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        "text": "An update for Red Hat Hardened Images RPMs is now available.",
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      },
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        "category": "general",
        "text": "This update includes the following RPMs:\n\nbusybox:\n  * busybox-1.37.0-7.3.hum1 (aarch64, x86_64)\n  * busybox-petitboot-1.37.0-7.3.hum1 (aarch64, x86_64)\n  * busybox-shared-1.37.0-7.3.hum1 (aarch64, x86_64)\n  * busybox-1.37.0-7.3.hum1.src (src)\n\nSecurity Fix(es):\n\nbusybox:\n  * CVE-2026-29004",
        "title": "Details"
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      "cwe": {
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        "name": "Incorrect Calculation of Buffer Size"
      },
      "discovery_date": "2026-05-04T19:03:24.638414+00:00",
      "ids": [
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          "text": "2466526"
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          "title": "Vulnerability description"
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        {
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          "text": "BusyBox: BusyBox: Arbitrary Code Execution via DHCPv6 Client Heap Buffer Overflow",
          "title": "Vulnerability summary"
        },
        {
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        {
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-29004",
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        },
        {
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29004"
        },
        {
          "category": "external",
          "summary": "https://busybox.net/",
          "url": "https://busybox.net/"
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        {
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          "summary": "https://github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409",
          "url": "https://github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/busybox-dhcpv6-client-heap-buffer-overflow-via-dns-servers",
          "url": "https://www.vulncheck.com/advisories/busybox-dhcpv6-client-heap-buffer-overflow-via-dns-servers"
        }
      ],
      "release_date": "2026-05-04T18:05:18.962000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-28T15:24:16+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:busybox-main@aarch64",
            "Red Hat Hardened Images:busybox-main@src",
            "Red Hat Hardened Images:busybox-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:30652"
        },
        {
          "category": "workaround",
          "details": "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.",
          "product_ids": [
            "Red Hat Hardened Images:busybox-main@aarch64",
            "Red Hat Hardened Images:busybox-main@src",
            "Red Hat Hardened Images:busybox-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "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"
          },
          "products": [
            "Red Hat Hardened Images:busybox-main@aarch64",
            "Red Hat Hardened Images:busybox-main@src",
            "Red Hat Hardened Images:busybox-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "BusyBox: BusyBox: Arbitrary Code Execution via DHCPv6 Client Heap Buffer Overflow"
    }
  ]
}



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Sightings

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Nomenclature

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