{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39457", "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "state": "PUBLISHED", "assignerShortName": "freebsd", "dateReserved": "2026-04-28T15:08:10.626Z", "datePublished": "2026-04-30T08:01:49.015Z", "dateUpdated": "2026-04-30T08:01:49.015Z"}, "containers": {"cna": {"datePublic": "2026-04-29T19:00:00.000Z", "title": "Stack overflow via select() file descriptor set overflow", "references": [{"tags": ["vendor-advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.asc"}], "affected": [{"defaultStatus": "unknown", "modules": ["libnv"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"status": "affected", "versionType": "release", "version": "15.0-RELEASE", "lessThan": "p7"}, {"status": "affected", "versionType": "release", "version": "14.4-RELEASE", "lessThan": "p3"}, {"status": "affected", "versionType": "release", "version": "14.3-RELEASE", "lessThan": "p12"}, {"status": "affected", "versionType": "release", "version": "13.5-RELEASE", "lessThan": "p13"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Joshua Rogers of AISLE Research Team"}], "descriptions": [{"lang": "en", "value": "When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024).\n\nAn attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges."}], "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": "2026-04-30T08:01:49.015Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024).\n\nAn attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges."}], "id": "CVE-2026-39457", "lastModified": "2026-04-30T09:16:03.270", "metrics": {}, "published": "2026-04-30T09:16:03.270", "references": [{"source": "secteam@freebsd.org", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.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": "[15.0-RELEASE,p7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[14.4-RELEASE,p3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[14.3-RELEASE,p12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[13.5-RELEASE,p13)"}}], "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": "2026-04-30T10:30:34.524833+00:00", "updated": "2026-04-30T10:30:34.524883+00:00", "vendors": ["freebsd", "freebsd$PRODUCT$freebsd"]}