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
Related
Published
2026-05-04T18:05:18.962Z
Modified
2026-07-16T03:48:24.448080435Z
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) DNSSERVERS option handler in networking/udhcp/d6dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6OPTDNSSERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the optionto_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.

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