CVE-2018-7550

QEMU: i386: multiboot OOB access while loading kernel image

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Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.0

Review impact separately from score.

Published · February 27, 2018

Updated · June 28, 2026

Description

Quick Emulator (QEMU), compiled with the PC System Emulator with multiboot feature support, is vulnerable to an OOB r/w memory access issue. The issue could occur while loading a kernel image during the guest boot, if mh_load_end_addr address is greater than the mh_bss_end_addr address. A user or process could use this flaw to potentially achieve arbitrary code execution on a host.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.8
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS 2.0 · 6.2
AV:L/AC:H/Au:N/C:C/I:C/A:C

CWE-787 · Out-of-bounds Write