CVE-2018-7550: canonical ubuntu_linux Out-of-bounds Read
Vulnerability summary
CVE-2018-7550 is a high (CVSS 8.8) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 49.3% of scored vulnerabilities.
Not severe (CVSS 8.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 10Timeline
- 01-03-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
0.61%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.61% on 05-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat6 products
- enterprise_linux_desktop7.0
- enterprise_linux_server7.0
- enterprise_linux_server_aus7.6 | 7.7
- enterprise_linux_server_eus7.5 | 7.6 | 7.7
- enterprise_linux_server_tus7.6 | 7.7
Debian3 products
- qemu< 1.1.2+dfsg-6+deb7u25 | < 1:2.12~rc3+dfsg-1
- qemu-kvm< 1.1.2+dfsg-6+deb7u25
- debian_linuxEOL7.0 | 8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10 | 18.04
Qemu1 product
- qemu≤ 2.11.1
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.41 | < 1:2.5+dfsg-5ubuntu10.28 | < 1:2.11+dfsg-1ubuntu7.1
5 vendors · 12 products
