CVE-2026-49418

{"id": "CVE-2026-49418", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49418", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-20T03:56:05.175712Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": 2.8}]}, "affected": [{"source": "secteam@freebsd.org", "affectedData": [{"vendor": "FreeBSD", "modules": ["vm"], "product": "FreeBSD", "versions": [{"status": "affected", "version": "15.1-RELEASE", "lessThan": "p1", "versionType": "release"}, {"status": "affected", "version": "15.0-RELEASE", "lessThan": "p11", "versionType": "release"}, {"status": "affected", "version": "14.4-RELEASE", "lessThan": "p7", "versionType": "release"}, {"status": "affected", "version": "14.3-RELEASE", "lessThan": "p16", "versionType": "release"}], "defaultStatus": "unknown"}]}], "published": "2026-08-19T05:17:03.943", "references": [{"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:37.vm.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": "When msync(MS_INVALIDATE) is called on a mapping of an unmanaged device object, the physical pages in the mapping range are marked invalid but remain in the pager's page list. A subsequent page fault will cause the fault handler to re-insert the page into the object's list. This corrupts the list, and on object destruction the page is freed twice.\n\nAn unprivileged local user with access to a device that provides memory-mapped I/O can trigger a use-after-free in the kernel, though this is limited to a pool of objects (\"fictitious pages\") that are never recycled for a different purpose. It may be possible to exploit this to escalate privileges."}], "lastModified": "2026-09-01T20:20:23.327", "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": 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