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Vigil@nce - Linux kernel: privilege escalation via Userfaultfd Sparse Tmpfs Files Write

February 2019 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerability-database-and-alert

SYNTHESIS OF THE VULNERABILITY

Impacted products: Linux, openSUSE Leap, RHEL, SUSE Linux
Enterprise Desktop, SLES.

Severity: 2/4.

Consequences: privileged access/rights, data creation/edition.

Provenance: user shell.

Confidence: confirmed by the editor (5/5).

Creation date: 12/12/2018.

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.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Linux-kernel-privilege-escalation-via-Userfaultfd-Sparse-Tmpfs-Files-Write-28013


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