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TI-2018-05458 Aliases CVE-2018-7550GHSA-6q85-h749-54pf

The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows…

Priority LOW 39CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 9 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.0061 49th percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 9 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 18

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*up to 2.11.1VulnerableQEMU
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions up to 2.11.1 Vulnerable ·QEMU
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 8 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 6 advisories

  • RHSA-2018:2462 Released 2018-08-16 · Red Hat rating Important
    qemu-kvm security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) qemu-img-10:1.5.3-156.el7_5.5, qemu-kvm-10:1.5.3-156.el7_5.5, qemu-kvm-common-10:1.5.3-156.el7_5.5 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img-10:1.5.3-156.el7_5.5, qemu-kvm-10:1.5.3-156.el7_5.5, qemu-kvm-common-10:1.5.3-156.el7_5.5 +1
    • Red Hat Enterprise Linux Server (v. 7) qemu-img-10:1.5.3-156.el7_5.5, qemu-kvm-10:1.5.3-156.el7_5.5, qemu-kvm-common-10:1.5.3-156.el7_5.5 +1
    • Red Hat Enterprise Linux Workstation (v. 7) qemu-img-10:1.5.3-156.el7_5.5, qemu-kvm-10:1.5.3-156.el7_5.5, qemu-kvm-common-10:1.5.3-156.el7_5.5 +1
  • RHSA-2018:1644 Released 2018-05-22 · Red Hat rating Important
    qemu-kvm-rhev security update
    • Red Hat OpenStack Platform 10.0 qemu-img-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-rhev-10:2.10.0-21.el7_5.3 +1
  • RHSA-2018:1646 Released 2018-05-22 · Red Hat rating Important
    qemu-kvm-rhev security update
    • Red Hat OpenStack Platform 8.0 (Liberty) qemu-img-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-rhev-10:2.10.0-21.el7_5.3 +1
Show 3 more Red Hat advisories
  • RHSA-2018:1643 Released 2018-05-22 · Red Hat rating Important
    qemu-kvm-rhev security update
    • Red Hat OpenStack Platform 12.0 qemu-img-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-rhev-10:2.10.0-21.el7_5.3 +1
  • RHSA-2018:1645 Released 2018-05-22 · Red Hat rating Important
    qemu-kvm-rhev security update
    • Red Hat OpenStack Platform 9.0 qemu-img-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3, qemu-kvm-rhev-10:2.10.0-21.el7_5.3 +1
  • RHSA-2018:1369 Released 2018-05-10 · Red Hat rating Moderate
    qemu-kvm-rhev security and bug fix update
    • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts qemu-img-rhev-10:2.10.0-21.el7_5.2, qemu-kvm-common-rhev-10:2.10.0-21.el7_5.2, qemu-kvm-rhev-10:2.10.0-21.el7_5.2 +1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)AffectedNo fix planned: Will not fix
Red Hat OpenStack Platform 11 (Ocata)AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:2462
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:2462
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:2462
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:2462
Red Hat OpenStack Platform 10.0Fixed RHSA-2018:1644
Red Hat OpenStack Platform 12.0Fixed RHSA-2018:1643
Red Hat OpenStack Platform 8.0 (Liberty)Fixed RHSA-2018:1646
Red Hat OpenStack Platform 9.0Fixed RHSA-2018:1645
Red Hat Virtualization 4 Management Agent for RHEL 7 HostsFixed RHSA-2018:1369
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-7550
  2. 2026-10-03 Alias added: GHSA-6q85-h749-54pf

References

Patch 1

Advisory 8

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences