{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-21T20:19:09.965","vulnerabilities":[{"cve":{"id":"CVE-2021-3492","sourceIdentifier":"security@ubuntu.com","published":"2021-04-17T05:15:13.113","lastModified":"2024-11-21T06:21:40.257","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562."},{"lang":"es","value":"Shiftfs, un sistema de archivos de apilamiento fuera del árbol incluido en los kernels de Ubuntu Linux, no manejaba apropiadamente los fallos que ocurrían durante la función copy_from_user(). Esto podría conllevar a una situación de doble liberación o a que la memoria no sea liberada del todo. Un atacante podría usar esto para causar una denegación de servicio (agotamiento de la memoria del kernel) u alcanzar privilegios por medio de la ejecución de código arbitrario. También se conoce como ZDI-CAN-13562"}],"metrics":{"cvssMetricV31":[{"source":"security@ubuntu.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.0,"impactScore":6.0},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","baseScore":7.2,"accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE"},"baseSeverity":"HIGH","exploitabilityScore":3.9,"impactScore":10.0,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security@ubuntu.com","type":"Secondary","description":[{"lang":"en","value":"CWE-401"},{"lang":"en","value":"CWE-415"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-401"},{"lang":"en","value":"CWE-415"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*","versionEndExcluding":"18.04","matchCriteriaId":"90A80DE7-3EFA-464C-9D31-C46521FFBFBF"},{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*","versionStartIncluding":"18.04.1","versionEndExcluding":"20.04","matchCriteriaId":"2027773B-26DA-408E-B71D-40D05690D9EA"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:-:*:*:*","versionEndExcluding":"20.10","matchCriteriaId":"ACAB2EE0-EC21-4669-840F-94F6C3028C64"}]}]}],"references":[{"url":"http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html","source":"security@ubuntu.com","tags":["Third 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