CVE-2026-46433

{"id": "CVE-2026-46433", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46433", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-10T18:12:17.598816Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/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": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "lldpd", "product": "lldpd", "versions": [{"status": "affected", "version": "< 1.0.22"}]}]}], "published": "2026-06-09T23:16:59.437", "references": [{"url": "https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/lldpd/lldpd/pull/787", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/lldpd/lldpd/releases/tag/1.0.22", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "lldpd is an implementation of IEEE 802.1ab (LLDP). Prior to version 1.0.22, lldpd_decode() in src/daemon/lldpd.c strips 802.1Q VLAN tags from received Ethernet frames by calling memmove() to shift the frame payload 4 bytes left. The third argument (byte count) is s - 2 * ETHER_ADDR_LEN but should be s - 2 * ETHER_ADDR_LEN - 4, causing a 4-byte heap buffer over-read past the malloc(h_mtu) allocation when the received frame size equals the interface MTU. This issue has been patched in version 1.0.22."}, {"lang": "es", "value": "lldpd es una implementaci\u00f3n de IEEE 802.1ab (LLDP). Antes de la versi\u00f3n 1.0.22, lldpd_decode() en src/daemon/lldpd.c elimina las etiquetas VLAN 802.1Q de las tramas Ethernet recibidas al llamar a memmove() para desplazar la carga \u00fatil de la trama 4 bytes a la izquierda. El tercer argumento (recuento de bytes) es s - 2 * ETHER_ADDR_LEN pero deber\u00eda ser s - 2 * ETHER_ADDR_LEN - 4, causando una lectura excesiva de b\u00fafer de pila de 4 bytes m\u00e1s all\u00e1 de la asignaci\u00f3n malloc(h_mtu) cuando el tama\u00f1o de la trama recibida es igual a la MTU de la interfaz. Este problema ha sido parcheado en la versi\u00f3n 1.0.22."}], "lastModified": "2026-07-23T09:10:00.113", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:lldpd_project:lldpd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DDD2CB1A-89DE-492A-B447-67FAAE9FC9A9", "versionEndExcluding": "1.0.22"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}