What’s Vulnerable › Vulnerabilities

CVE-2018-7550

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-01 · updated 2026-06-17
• Weakness: CWE-125

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10, 18.04
• Debian Linux: 7.0, 8.0, 9.0
• QEMU: through 2.11.1
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.6, 7.7
• RedHat Enterprise Linux Server Eus: 7.5, 7.6, 7.7
• RedHat Enterprise Linux Server Tus: 7.6, 7.7
• RedHat Enterprise Linux Workstation: 7.0

References

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

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