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Vigil@nce - Linux kernel: denial of service via PPC State

April 2016 by Marc Jacob

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

A local attacker can generate an error in PowerPC states on the
Linux kernel, in order to trigger a denial of service.

Impacted products: Linux.

Severity: 1/4.

Creation date: 13/04/2016.

DESCRIPTION OF THE VULNERABILITY

The Linux kernel restores registers after processing a signal.

However, some PowerPC state registers are not restored, which
leads to a BUG_ON().

A local attacker can therefore generate an error in PowerPC states
on the Linux kernel, in order to trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-PPC-State-19370


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