CVE-2026-43894

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{"affected": [{"affectedData": [{"product": "jq", "vendor": "jqlang", "versions": [{"status": "affected", "version": "<= 1.8.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*", "matchCriteriaId": "2026D0D9-8A88-43D4-9995-CF7928D9FFB8", "versionEndIncluding": "1.8.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes \u2248715 million 16-bit units (\u22481.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed 3-per-unit)."}, {"lang": "es", "value": "jq es un procesador JSON de l\u00ednea de comandos. En la versi\u00f3n 1.8.1 y anteriores, cuando a decNumberFromString se le proporciona un literal num\u00e9rico de INT_MAX-1 (2147483646) d\u00edgitos, la macro D2U() desborda durante la aritm\u00e9tica de enteros con signo. El valor negativo envuelto omite la comprobaci\u00f3n del tama\u00f1o de la asignaci\u00f3n de memoria din\u00e1mica (heap), hace que la funci\u00f3n utilice un b\u00fafer de pila de 30 bytes y luego escribe ?715 millones de unidades de 16 bits (?1.4 GiB) en un desplazamiento de 1.43 GiB por debajo del marco de pila. El contenido escrito est\u00e1 totalmente controlado por el atacante (los d\u00edgitos decimales analizados, empaquetados 3 por unidad)."}], "id": "CVE-2026-43894", "lastModified": "2026-10-26T18:10:00.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43894", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-11T18:32:08.384699Z", "version": "2.0.3"}}]}, "published": "2026-05-11T18:16:37.250", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "jq: jq: Arbitrary Code Execution or Denial of Service via Signed Integer Overflow", "id": "2469175", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2469175"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["A flaw was found in jq, a tool used for processing JSON data from the command line. A remote attacker can exploit a vulnerability by providing a specially crafted large number as input. This can cause an internal calculation error, leading to a memory overflow where the attacker can write their own data into the system's memory, potentially resulting in the application crashing (Denial of Service)."], "name": "CVE-2026-43894", "package_state": [{"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/hub-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Out of support scope", "package_name": "automation-controller", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ceph_storage:4", "fix_state": "Out of support scope", "package_name": "jq", "product_name": "Red Hat Ceph Storage 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "jq", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Under investigation", "package_name": "jq", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-05-11T17:20:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43894\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43894\nhttps://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g"], "threat_severity": "Moderate"}

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