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Vigil@nce - Linux kernel: use after free via nested_get_vmcs12_pages

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, Ubuntu.

Severity: 2/4.

Consequences: administrator access/rights, privileged
access/rights, denial of service on server, denial of service on
service.

Provenance: user shell.

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

Creation date: 19/12/2018.

DESCRIPTION OF THE VULNERABILITY

An attacker, inside a guest system, can force the usage of a freed
memory area via nested_get_vmcs12_pages() of the Linux kernel, in
order to trigger a denial of service, and possibly to run code on
the host system.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Linux-kernel-use-after-free-via-nested-get-vmcs12-pages-28048


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