CVE-2026-5398

{"id": "CVE-2026-5398", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5398", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-22T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.4, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/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"}, "impactScore": 5.9, "exploitabilityScore": 2.5}]}, "affected": [{"source": "secteam@freebsd.org", "affectedData": [{"vendor": "FreeBSD", "modules": ["tty"], "product": "FreeBSD", "versions": [{"status": "affected", "version": "15.0-RELEASE", "lessThan": "p6", "versionType": "release"}, {"status": "affected", "version": "14.4-RELEASE", "lessThan": "p2", "versionType": "release"}, {"status": "affected", "version": "14.3-RELEASE", "lessThan": "p11", "versionType": "release"}, {"status": "affected", "version": "13.5-RELEASE", "lessThan": "p12", "versionType": "release"}], "defaultStatus": "unknown"}]}], "published": "2026-04-22T03:16:01.213", "references": [{"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:10.tty.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 implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session. If the invoking process then exits, the terminal structure may end up containing a pointer to freed memory.\n\nA malicious process can abuse the dangling pointer to grant itself root privileges."}], "lastModified": "2026-06-17T10:58:57.740", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "947F561E-AD65-43B9-94C1-3109A3D35248"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4216D505-95A5-4FCC-8B9A-26FCD32B0445"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3D1987F1-1E08-4B28-8D16-D25A091D99ED"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4C859EE2-59C0-4234-BFF0-7794AC4956DD"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p11:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D1CEB391-5FA3-4FFD-9279-113093DD500D"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BEC1E8A0-0402-45F1-938D-FEFDCFC3E747"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D94457D6-738F-4ABB-BD46-F2B621531FE2"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8C38CB56-B80C-4D1B-9267-16E8F985B170"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13DF1E38-5E8D-42FF-A4C5-092300864F3E"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83A86F81-0965-4600-835A-496756137998"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "987E31A4-7E21-471E-A3EA-4E53FFDB3DFB"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:13.5:p8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": 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"B187670D-E3A2-4A0D-A653-982F8B447E78"}], "operator": "OR"}]}], "sourceIdentifier": "secteam@freebsd.org"}