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Date: Thu, 8 Mar 2018 23:52:33 +0530 (IST)
From: P J P <>
To: oss security list <>
cc: Cyrille Chatras <>
Subject: CVE-2018-7550 Qemu: i386: multiboot OOB access while loading kernel


Quick Emulator(QEMU) built with the PC System Emulator with multiboot feature 
support is vulnerable to an OOB r/w memory access issue. It could occur while 
loading a kernel image during a guest boot if multiboot head addresses 
mh_load_end_addr was greater than mh_bss_end_addr.

A user/process could use this flaw to potentially achieve arbitrary code 
execution on a host.

Upstream patch:

This issue was reported by Cyrille Chatras of

CVE-2018-7550 assigned via ->

Thank you.
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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