CVE-2011-2189

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[{"lang": "en", "value": "net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd."}, {"lang": "es", "value": "net / core / net_namespace.c en el kernel de Linux v2.6.32 y anteriores no maneja adecuadamente una alta tasa de creaci\u00f3n y limpieza de los espacios de nombres de red, lo cual lo hace m\u00e1s f\u00e1cil para los atacantes remotos provocar una denegaci\u00f3n de servicio (consumo de memoria) a trav\u00e9s de peticiones a un demonio que requiere un espacio de nombres separados por conexi\u00f3n, como se demuestra por vsftpd."}], "id": "CVE-2011-2189", "lastModified": "2026-06-16T23:30:53.227", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2011-10-10T10:55:05.503", 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{"bugzilla": {"description": "kernel: net_ns: oom killer fires because of slow net_ns cleanup", "id": "711245", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=711245"}, "csaw": false, "cvss": {"cvss_base_score": "4.6", "cvss_scoring_vector": "AV:L/AC:L/Au:S/C:N/I:N/A:C", "status": "draft"}, "details": ["net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd."], "name": "CVE-2011-2189", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2011-02-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-2189\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-2189"], "statement": "This did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as they did not include support for Network Namespaces. A future kernel update in Red Hat Enterprise MRG may address this issue. The risks associated with fixing this flaw outweigh the benefits of the fix, therefore Red Hat does not plan to fix this flaw in Red Hat Enterprise Linux 6.", "threat_severity": "Moderate"}

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