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This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability."},{"lang":"es","value":"Se ha encontrado un fallo de desreferencia de puntero NULL en la función btrfs_rm_device en el archivo fs/btrfs/volumes.c en el Kernel de Linux, donde el desencadenamiento del bug requiere \"CAP_SYS_ADMIN\". Este fallo permite a un atacante local bloquear el sistema o filtrar información interna del kernel. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema"}],"id":"CVE-2021-3739","lastModified":"2026-09-01T18:03:54.870","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"LOW","cvssData":{"accessComplexity":"LOW","accessVector":"LOCAL","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":3.6,"confidentialityImpact":"PARTIAL","integrityImpact":"NONE","vectorString":"AV:L/AC:L/Au:N/C:P/I:N/A:P","version":"2.0"},"exploitabilityScore":3.9,"impactScore":4.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"exploitabilityScore":1.8,"impactScore":5.2,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2022-03-10T17:43:01.463","references":[{"source":"secalert@redhat.com","tags":["Issue Tracking","Patch","Third Party Advisory"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1997958"},{"source":"secalert@redhat.com","tags":["Mailing List","Patch","Vendor Advisory"],"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091"},{"source":"secalert@redhat.com","tags":["Exploit","Patch","Third Party Advisory"],"url":"https://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091"},{"source":"secalert@redhat.com","tags":["Third Party Advisory"],"url":"https://security.netapp.com/advisory/ntap-20220407-0006/"},{"source":"secalert@redhat.com","tags":["Third Party Advisory"],"url":"https://ubuntu.com/security/CVE-2021-3739"},{"source":"secalert@redhat.com","tags":["Mailing List","Patch","Third Party Advisory"],"url":"https://www.openwall.com/lists/oss-security/2021/08/25/3"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1997958"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Vendor Advisory"],"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Patch","Third Party Advisory"],"url":"https://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://security.netapp.com/advisory/ntap-20220407-0006/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://ubuntu.com/security/CVE-2021-3739"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Third Party Advisory"],"url":"https://www.openwall.com/lists/oss-security/2021/08/25/3"}],"sourceIdentifier":"secalert@redhat.com","vulnStatus":"Analyzed","weaknesses":[{"description":[{"lang":"en","value":"CWE-476"}],"source":"secalert@redhat.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-476"}],"source":"nvd@nist.gov","type":"Primary"}]}