{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49420", "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "state": "PUBLISHED", "assignerShortName": "freebsd", "dateReserved": "2026-05-29T20:24:28.616Z", "datePublished": "2026-08-19T05:20:00.559Z", "dateUpdated": "2026-08-19T12:13:39.385Z"}, "containers": {"cna": {"datePublic": "2026-06-30T20:00:00.000Z", "title": "Buffer overflow in libalias RTSP handler", "references": [{"tags": ["vendor-advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:41.libalias.asc"}], "affected": [{"defaultStatus": "unknown", "modules": ["libalias"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"status": "affected", "versionType": "release", "version": "15.1-RELEASE", "lessThan": "p1"}, {"status": "affected", "versionType": "release", "version": "15.0-RELEASE", "lessThan": "p11"}, {"status": "affected", "versionType": "release", "version": "14.4-RELEASE", "lessThan": "p7"}, {"status": "affected", "versionType": "release", "version": "14.3-RELEASE", "lessThan": "p16"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Atuin - Automated Vulnerability Discovery Engine, Tianchu Chen of Tencent Xuanwu Lab"}, {"lang": "en", "type": "finder", "value": "UC Berkeley Antiproof"}, {"lang": "en", "type": "finder", "value": "Stanislav Fort of Aisle Research"}], "descriptions": [{"lang": "en", "value": "The RTSP handler in libalias rewrote outgoing packets into a fixed-length stack buffer without checking whether the rewritten data fit in the buffer, or whether the result fit back in the original packet.\n\nA host sending crafted RTSP traffic from inside a NAT gateway using libalias can overflow a stack buffer, potentially achieving remote code execution in the kernel (when using ipfw(4) NAT) or in the natd(8) process (which generally runs as the root user)."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "description": "CWE-121: Stack-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "shortName": "freebsd", "dateUpdated": "2026-08-19T05:20:00.559Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-19T12:13:33.163429Z", "id": "CVE-2026-49420", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-19T12:13:39.385Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "modules": ["libalias"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"lessThan": "p1", "status": "affected", "version": "15.1-RELEASE", "versionType": "release"}, {"lessThan": "p11", "status": "affected", "version": "15.0-RELEASE", "versionType": "release"}, {"lessThan": "p7", "status": "affected", "version": "14.4-RELEASE", "versionType": "release"}, {"lessThan": "p16", "status": "affected", "version": "14.3-RELEASE", "versionType": "release"}]}], "source": "secteam@freebsd.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The RTSP handler in libalias rewrote outgoing packets into a fixed-length stack buffer without checking whether the rewritten data fit in the buffer, or whether the result fit back in the original packet.\n\nA host sending crafted RTSP traffic from inside a NAT gateway using libalias can overflow a stack buffer, potentially achieving remote code execution in the kernel (when using ipfw(4) NAT) or in the natd(8) process (which generally runs as the root user)."}], "id": "CVE-2026-49420", "lastModified": "2026-08-19T13:17:45.730", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49420", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T12:13:33.163429Z", "version": "2.0.3"}}]}, "published": "2026-08-19T06:17:40.790", "references": [{"source": "secteam@freebsd.org", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:41.libalias.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[15.1-RELEASE,p1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[15.0-RELEASE,p11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[14.4-RELEASE,p7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[14.3-RELEASE,p16)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "FreeBSD", "source": "cna", "vendor": "FreeBSD"}, "product": "freebsd", "vendor": "freebsd"}], "created": "2026-08-19T06:30:05.491949+00:00", "updated": "2026-08-19T11:30:04.314967+00:00", "vendors": ["freebsd", "freebsd$PRODUCT$freebsd"]}