CVE-2026-38755

A heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.

CVSS v3 2.9 LOW

2.9^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.4 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://busybox.net
https://lists.busybox.net/pipermail/busybox/2026-June/092354.html	Mailing List Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:busybox:busybox:1.38.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-15 22:16

Updated : 2026-07-20 16:16

NVD link : CVE-2026-38755

Mitre link : CVE-2026-38755

CVE.ORG link : CVE-2026-38755

JSON object : View

Products Affected

busybox

busybox

CWE

CWE-674

Uncontrolled Recursion

CWE-122

Heap-based Buffer Overflow

{"id": "CVE-2026-38755", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-38755", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-16T15:19:58.220050Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 2.9, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 1.4}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "BusyBox", "product": "BusyBox", "versions": [{"status": "affected", "version": "0.52", "versionType": "custom", "lessThanOrEqual": "1.38.0"}], "defaultStatus": "unknown"}]}], "published": "2026-07-15T22:16:47.340", "references": [{"url": "https://busybox.net", "source": "cve@mitre.org"}, {"url": "https://lists.busybox.net/pipermail/busybox/2026-June/092354.html", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-674"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-122"}]}], "descriptions": [{"lang": "en", "value": "A heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input."}], "lastModified": "2026-07-20T16:16:59.113", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:busybox:busybox:1.38.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6C34EDB0-E9BB-4949-93DA-90ED68F65680"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}