CVE-2018-7550

Name: CVE-2018-7550
Creator: NVD / NIST
Published: 2018-03-01T17:29:00.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2018-7550 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.64%

45.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.11.1
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Canonical	Ubuntu Linux	18.04
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.6
Redhat	Enterprise Linux Server Aus	7.7
Redhat	Enterprise Linux Server Eus	7.5
Redhat	Enterprise Linux Server Eus	7.6
Redhat	Enterprise Linux Server Eus	7.7
Redhat	Enterprise Linux Server Tus	7.6
Redhat	Enterprise Linux Server Tus	7.7
Redhat	Enterprise Linux Workstation	7.0

References

http://www.securityfocus.com/bid/103181Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:1369Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2462Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1549798Issue Tracking, Vendor Advisory
https://github.com/orangecertcc/security-research/security/advisories/GHSA-f49v-45qp-cv53
https://lists.debian.org/debian-lts-announce/2018/04/msg00015.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00016.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg06890.htmlMailing List, Patch
https://usn.ubuntu.com/3649-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4213Third Party Advisory
http://www.securityfocus.com/bid/103181Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:1369Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2462Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1549798Issue Tracking, Vendor Advisory
https://github.com/orangecertcc/security-research/security/advisories/GHSA-f49v-45qp-cv53
https://lists.debian.org/debian-lts-announce/2018/04/msg00015.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00016.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg06890.htmlMailing List, Patch
https://usn.ubuntu.com/3649-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4213Third Party Advisory

Timeline

Published: Mar 1, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7550?

How severe is CVE-2018-7550?

CVE-2018-7550 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7550?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7550?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST