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vulnerability bulletin CVE-2018-18397

Linux kernel: privilege escalation via Userfaultfd Sparse Tmpfs Files Write

Synthesis of the vulnerability

An attacker can bypass restrictions via Userfaultfd Sparse Tmpfs Files Write of the Linux kernel, in order to escalate his privileges.
Impacted systems: Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Consequences of an intrusion: privileged access/rights, data creation/edition.
Pirate's origin: user shell.
Creation date: 12/12/2018.
Références of this alert: 1700, CERTFR-2019-AVI-038, CERTFR-2019-AVI-042, CERTFR-2019-AVI-091, CVE-2018-18397, openSUSE-SU-2019:0065-1, RHSA-2019:0163-01, RHSA-2019:0202-01, RHSA-2019:0324-01, SUSE-SU-2019:0196-1, SUSE-SU-2019:0222-1, SUSE-SU-2019:0224-1, USN-3901-1, USN-3901-2, USN-3903-1, USN-3903-2, VIGILANCE-VUL-28013.

Description of the vulnerability

An attacker can bypass restrictions via Userfaultfd Sparse Tmpfs Files Write of the Linux kernel, in order to escalate his privileges.
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