{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-57842",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-06-25T18:48:00.281Z",
        "datePublished": "2026-09-11T13:48:13.267Z",
        "dateUpdated": "2026-10-01T15:20:04.610Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
                "shortName": "VulnCheck",
                "dateUpdated": "2026-10-01T15:20:04.610Z"
            },
            "title": "NetBSD COMPAT_NETBSD32 Double Free / Use-After-Free via recvmsg() msg_iovlen",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "NetBSD contains a use-after-free and double-free vulnerability in msg_recv_copyin() within the COMPAT_NETBSD32 compatibility layer due to a missing return statement before the cleanup label on the success path. Any local user able to execute a 32-bit binary on a 64-bit NetBSD system can trigger a kernel panic or memory corruption by calling recvmsg() with msg_iovlen between 9 and IOV_MAX, causing the kernel to access a freed iovec buffer and subsequently free the same allocation a second time."
                }
            ],
            "tags": [
                "x_open-source"
            ],
            "datePublic": "2026-06-26T00:00:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-415",
                            "description": "Double Free",
                            "type": "CWE"
                        },
                        {
                            "lang": "en",
                            "cweId": "CWE-416",
                            "description": "Use After Free",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "vendor": "The NetBSD Foundation",
                    "product": "NetBSD",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "8.0",
                            "versionType": "custom",
                            "lessThanOrEqual": "8.3"
                        },
                        {
                            "status": "affected",
                            "version": "9.0",
                            "versionType": "custom",
                            "lessThan": "9.5"
                        },
                        {
                            "status": "affected",
                            "version": "10.0",
                            "versionType": "custom",
                            "lessThanOrEqual": "10.1"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "8.0",
                                    "versionEndIncluding": "8.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "9.0",
                                    "versionEndExcluding": "9.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "10.0",
                                    "versionEndIncluding": "10.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "HIGH",
                        "baseScore": 7.3,
                        "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
                    }
                },
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV3_1": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "version": "3.1",
                        "baseSeverity": "HIGH",
                        "baseScore": 7,
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://gnats.netbsd.org/60373",
                    "name": "Patch Commit",
                    "tags": [
                        "vendor-advisory",
                        "patch"
                    ]
                },
                {
                    "url": "https://www.vulncheck.com/advisories/netbsd-compat-netbsd32-double-free-use-after-free-via-recvmsg-msg-iovlen",
                    "tags": [
                        "third-party-advisory"
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Tristan CLERC",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "VulnCheck",
                    "type": "coordinator"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "vulncheck"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-11T14:56:09.344902Z",
                                "id": "CVE-2026-57842",
                                "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": "2026-09-11T14:56:18.726Z"
                }
            }
        ]
    }
}