CVE-2018-16884

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{"affected": [{"affectedData": [{"product": "kernel:", "vendor": "[UNKNOWN]", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF7B0E80-3E3F-4B73-AC57-4D6989EF9805", "versionEndExcluding": "3.16.65", "versionStartIncluding": "3.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AA41D1F8-EFFE-4EC9-B0AE-C5FFE82B6F74", "versionEndExcluding": "3.18.133", "versionStartIncluding": "3.17", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "03F2AFB8-B8E8-496E-8107-FACE504D851D", "versionEndExcluding": "4.4.171", "versionStartIncluding": "3.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C6FA30C2-06D9-4FC0-A64A-4D30FBF34810", "versionEndExcluding": "4.9.151", "versionStartIncluding": "4.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2AF1D6FF-6D18-4CEB-B3A5-21FCF8A36055", "versionEndExcluding": "4.14.94", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CD130255-0E04-4A26-94E8-CF4C39A962B1", "versionEndExcluding": "4.19.16", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FB066CC3-3C28-424B-A71C-352F4947F7FB", "versionEndExcluding": "4.20.3", "versionStartIncluding": "4.20", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:*", "matchCriteriaId": "C60FA8B1-1802-4522-A088-22171DCF7A93", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out."}, {"lang": "es", "value": "Se ha encontrado un error en el subsistema de archivos NFS41+ del kernel de Linux. Las comparticiones de NFS41+ montadas en diferentes espacios de nombre al mismo tiempo pueden hacer que bc_svc_process() emplee el ID de canal trasero err\u00f3neo y provoque una vulnerabilidad de uso de memoria previamente liberada. As\u00ed, un usuario contenedor malicioso puede provocar la corrupci\u00f3n de la memoria host del kernel y un p\u00e1nico del sistema. Debido a la naturaleza del error, no se puede descartar totalmente un escalado de privilegios."}], "id": "CVE-2018-16884", "lastModified": "2026-06-17T01:44:59.483", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 6.7, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:A/AC:L/Au:S/C:P/I:P/A:C", "version": "2.0"}, "exploitabilityScore": 5.1, "impactScore": 8.5, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": 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[{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Evgenii Shatokhin (Virtuozzo) and Vasily Averin (Virtuozzo) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2019:1891", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-957.27.2.rt56.940.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-07-29T00:00:00Z"}, {"advisory": "RHSA-2019:1873", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-957.27.2.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:2854", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-alt-0:4.14.0-115.26.1.el7a", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-07T00:00:00Z"}, {"advisory": "RHSA-2019:2696", "cpe": "cpe:/o:redhat:rhel_eus:7.4", "package": "kernel-0:3.10.0-693.58.1.el7", "product_name": "Red Hat Enterprise Linux 7.4 Extended Update Support", "release_date": "2019-09-12T00:00:00Z"}, {"advisory": "RHSA-2019:3309", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-147.rt24.93.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}, {"advisory": "RHSA-2019:3517", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-147.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}, {"advisory": "RHSA-2020:0204", "cpe": "cpe:/o:redhat:rhel_e4s:8.0", "package": "kernel-0:4.18.0-80.15.1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-01-22T00:00:00Z"}, {"advisory": "RHSA-2019:2730", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-1:3.10.0-693.58.1.rt56.652.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2019-09-11T00:00:00Z"}], "bugzilla": {"description": "kernel: nfs: use-after-free in svc_process_common()", "id": "1660375", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1660375"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.", "A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out."], "name": "CVE-2018-16884", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2018-11-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-16884\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-16884"], "threat_severity": "Important"}

{}