What is CVE-2019-15034?

CVE-2019-15034 is a medium-severity vulnerability in Qemu, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.8/10. Published 2020-03-10.

How severe is CVE-2019-15034?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Buffer overflow in Qemu

CVE-2019-15034

hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading to a buffer overflow involving the PCIe extended config space.

Vulnerability class: Buffer Overflow

Published 2020-03-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Qemu — versions 4.0.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

lists.gnu.org/archive/html/qemu-devel/2019-08/msg01959.html (Patch, Mailing List, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html (vendor-advisory)
www.debian.org/security/2020/dsa-4665 (vendor-advisory)
usn.ubuntu.com/4372-1/ (vendor-advisory)

Frequently asked questions

What is CVE-2019-15034?: CVE-2019-15034 is a medium-severity vulnerability in Qemu, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.8/10. Published 2020-03-10.
How severe is CVE-2019-15034?: Medium severity. CVSS v3 base score is 5.8 out of 10.