CVE-2026-29004

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Source
https://cve.org/CVERecord?id=CVE-2026-29004
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-29004.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-29004
Downstream
BELL (1)
DEBIAN (1)
ECHO (1)
OESA (1)
openSUSE (2)
RHSA (1)
SUSE (6)
UBUNTU (1)
Related
openSUSE (2)
SUSE (6)
Published
2026-05-04T18:05:18Z
Modified
2026-08-12T15:32:13Z
Severity
  • 7.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
BusyBox DHCPv6 Client Heap Buffer Overflow via DNS_SERVERS
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.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-122"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29004.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "fixed":  "42202bfb1e6ac51fa995beda8be4d7b654aeee2a"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/vda-linux/busybox_mirror

Affected ranges

Type
GIT
Repo
https://github.com/vda-linux/busybox_mirror
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
42202bfb1e6ac51fa995beda8be4d7b654aeee2a
Fixed
d368f3f7836d1c2484c8f839316e5c93e76d4409
Database specific
Show details 
{
    "source":  "REFERENCES"
}

Affected versions

Other
0_29alpha2
0_32
0_33
0_34
0_36
0_39
0_40
0_41
0_42
0_43
0_43pre1
0_45
0_46
0_47
0_48
0_49
0_50
0_51
0_52
0_60_0
0_60_1
0_60_2
0_60_3
0_60_4
0_60_5
1_00
1_00_pre1
1_00_pre10
1_00_pre2
1_00_pre3
1_00_pre4
1_00_pre5
1_00_pre6
1_00_pre7
1_00_pre8
1_00_pre9
1_00_rc1
1_00_rc2
1_00_rc3
1_10_0
1_12_0
1_14_0
1_15_0
1_16_0
1_17_0
1_18_0
1_19_0
1_1_0
1_1_1
1_20_0
1_21_0
1_22_0
1_23_0
1_24_0
1_25_0
1_26_0
1_27_0
1_28_0
1_29_0
1_2_0
1_30_0
1_31_0
1_32_0
1_33_0
1_34_0
1_35_0
1_36_0
1_37_0
1_4_0
1_8_0
1_9_0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-29004.json"
vanir_signatures 
[
    {
        "deprecated":  false,
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            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-29004-0abe9a5e",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/vda-linux/busybox_mirror/commit/42202bfb1e6ac51fa995beda8be4d7b654aeee2a",
        "target":  {
            "file":  "networking/udhcp/d6_dhcpc.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
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            "threshold":  0.9
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        "id":  "CVE-2026-29004-172421e1",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409",
        "target":  {
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        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "172096019965372411198333436523014313930",
            "length":  2486
        },
        "id":  "CVE-2026-29004-c5e581e1",
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        "source":  "https://github.com/vda-linux/busybox_mirror/commit/42202bfb1e6ac51fa995beda8be4d7b654aeee2a",
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            "file":  "networking/udhcp/d6_dhcpc.c",
            "function":  "option_to_env"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
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            "length":  2496
        },
        "id":  "CVE-2026-29004-e4ee48a0",
        "signature_type":  "Function",
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        "source":  "https://github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409",
        "target":  {
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        }
    }
]
vanir_signatures_modified 
"2026-08-12T15:32:13Z"