CVE-2026-49412

{"id": "CVE-2026-49412", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49412", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-29T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "secteam@freebsd.org", "affectedData": [{"vendor": "FreeBSD", "modules": ["ip6_multicast"], "product": "FreeBSD", "versions": [{"status": "affected", "version": "15.0-RELEASE", "lessThan": "p10", "versionType": "release"}, {"status": "affected", "version": "14.4-RELEASE", "lessThan": "p6", "versionType": "release"}, {"status": "affected", "version": "14.3-RELEASE", "lessThan": "p15", "versionType": "release"}], "defaultStatus": "unknown"}]}], "published": "2026-06-27T09:16:23.937", "references": [{"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:29.ip6_multicast.asc", "tags": ["Vendor Advisory"], "source": "secteam@freebsd.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secteam@freebsd.org", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory.\n\nAn unprivileged local user can exploit this use-after-free to escalate privileges."}], "lastModified": "2026-07-01T14:04:44.963", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9DC7C54E-58AF-4ADE-84AF-0EF0F325E20E"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D3D22B8C-36CF-4800-9673-0B0240558BDD"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7296F5AA-F8C1-4277-A4EE-C2B24073A320"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C30E4A9C-0594-4F40-92B3-26CB9AA85AE9"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9F83F91B-587A-433C-99DB-0D63E267FF16"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "44B9C2FC-756E-459F-8E68-C2C2B8C258AC"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p14:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A11526CF-505E-47DF-8388-65CB216D2022"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "242FA2A8-5D7D-4617-A411-2651FF3A3E4C"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "40573F60-F3B7-4AEC-846A-B08E5B7D9D00"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1FB832CE-0A98-44A2-8BAC-CD38A64279B6"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9A785F8E-C218-41AE-8D57-BF06DDAEF7CB"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C3909FDD-B2A2-45B6-A40B-1D303A717F15"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "720597A2-F181-46E1-8A0D-097E17ADC4FB"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DC8A75D0-148A-427A-9783-45477EABED21"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5D39FC9-6DBA-46C8-BB80-A6188E6A8527"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8F3856BE-666F-4FA1-A6AD-FE179CEBF1E4"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D9CC0037-3282-42C3-80D8-F6C1D43B9332"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1EADA828-3C20-43C0-A0CA-3AC7D7F23DBD"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "53D73FD2-4B06-47D3-BA2A-4363E9DE3565"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D726890B-E679-43A9-A211-D5C05BBE3941"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CBE94635-5277-4050-8098-F062091F6596"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "368CFE5D-C5C2-42AF-AAF4-28DFE1A59C3B"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AA4AAA57-70A7-4717-ACF2-A253E757FF2C"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E24ABFA6-4D12-4DE5-832B-438502C7D188"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C1C9869C-494B-4628-9AA3-4AA5B989C377"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "002AA2FE-C7BA-471A-9434-0E56A878ACBF"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B187670D-E3A2-4A0D-A653-982F8B447E78"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "047E7EE9-FB51-4CF2-A8BE-484BFD819565"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C9768AE-9954-4B2A-9525-D7D4942406E7"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F8B9EF55-3755-452A-B067-043803099B22"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE3C4F40-A117-4B37-8CDD-096A1A763630"}], "operator": "OR"}]}], "sourceIdentifier": "secteam@freebsd.org"}