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{"bugzilla": {"description": "busybox: Busybox: Denial of Service via heap overflow in evalcommand() function", "id": "2501194", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501194"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["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.", "A flaw was found in Busybox. A heap overflow vulnerability in the `evalcommand()` function allows attackers to cause a Denial of Service (DoS) by supplying a specially crafted input. This can lead to the unavailability of the service."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-38755", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "busybox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "impact": "moderate", "package_name": "busybox", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-38755\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-38755\nhttps://busybox.com\nhttps://lists.busybox.net/pipermail/busybox/2026-June/092354.html"], "statement": "This Moderate impact flaw in Busybox's `evalcommand()` function can lead to a Denial of Service. The vulnerability requires an attacker to supply specially crafted input, which typically implies existing local access or specific application interactions within the Busybox environment, thus limiting the direct exposure.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "1.38.0"}}], "enrichment": {"confidence": 85.0, "confidence_source": "inferred", "scores": [{"score": 85.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "busybox", "vendor": "busybox"}], "created": "2026-07-15T23:15:15.710636+00:00", "title": "Heap Overflow in BusyBox evalcommand() Leading to DoS", "updated": "2026-07-17T06:00:04.669357+00:00", "vendors": ["busybox", "busybox$PRODUCT$busybox"]}