CVE-2017-7518

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A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this."}, {"lang": "es", "value": "Se ha detectado un error en el kernel de Linux en versiones anteriores a la 4.12 en la forma en la que el m\u00f3dulo KVM proces\u00f3 el bit trap flag(TF) en EFLAGS durante la emulaci\u00f3n de la instrucci\u00f3n de la llamada del sistema, lo que conduce a que se lance una excepci\u00f3n de depuraci\u00f3n (#DB) en la pila invitada. Un usuario/proceso en un invitado podr\u00eda utilizar este error para escalar sus privilegios en el invitado. Los invitados de Linux no se han visto afectados por esto."}], "id": "CVE-2017-7518", "lastModified": "2026-06-17T01:24:30.717", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": 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{"affected_release": [{"advisory": "RHSA-2018:0412", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-693.21.1.rt56.639.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-03-06T00:00:00Z"}, {"advisory": "RHSA-2018:0395", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-693.21.1.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-03-06T00:00:00Z"}], "bugzilla": {"description": "Kernel: KVM: debug exception via syscall emulation", "id": "1464473", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1464473"}, "csaw": false, "cvss": {"cvss_base_score": "5.4", "cvss_scoring_vector": "AV:A/AC:M/Au:N/C:P/I:P/A:P", "status": "verified"}, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "status": "verified"}, "cwe": "CWE-250", "details": ["A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.", "A flaw was found in the way the Linux KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this."], "name": "CVE-2017-7518", "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"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2017-06-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-7518\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-7518"], "statement": "This issue does not affect the versions of the kernel package as shipped with\nRed Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.\nThis issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 7. Future kernel updates for Red Hat Enterprise Linux 7\nmay address this issue.", "threat_severity": "Moderate"}

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