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vulnerability bulletin CVE-2019-7221

Linux kernel: privilege escalation via KVM Preemption Timer

Synthesis of the vulnerability

An attacker can bypass restrictions via KVM Preemption Timer of the Linux kernel, in order to escalate his privileges.
Impacted systems: Debian, Fedora, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Consequences of an intrusion: administrator access/rights, privileged access/rights.
Pirate's origin: user shell.
Creation date: 13/02/2019.
Références of this alert: CERTFR-2019-AVI-131, CERTFR-2019-AVI-145, CVE-2019-7221, DLA-1731-1, DLA-1731-2, FEDORA-2019-164946aa7f, FEDORA-2019-3da64f3e61, openSUSE-SU-2019:0203-1, openSUSE-SU-2019:0274-1, SUSE-SU-2019:0541-1, SUSE-SU-2019:0765-1, SUSE-SU-2019:0767-1, SUSE-SU-2019:0828-1, SUSE-SU-2019:0901-1, USN-3930-1, USN-3930-2, USN-3931-1, USN-3931-2, USN-3932-1, USN-3932-2, VIGILANCE-VUL-28493.

Description of the vulnerability

An attacker can bypass restrictions via KVM Preemption Timer of the Linux kernel, in order to escalate his privileges.
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