CVE-2018-7858
QEMU: cirrus: OOB access when updating VGA display
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · March 8, 2018
Updated · June 28, 2026
Description
Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.
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 · 5.5CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS 2.0 · 4.9AV:A/AC:M/Au:S/C:P/I:P/A:P
CWE-125 · Out-of-bounds Read