What is CVE-2020-13791?

CVE-2020-13791 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2020-06-04.

How severe is CVE-2020-13791?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Out-of-bounds Read in Qemu

CVE-2020-13791

hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an address near the end of the PCI configuration space.

Vulnerability class: Buffer Overflow

Published 2020-06-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.4% 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

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

lists.gnu.org/archive/html/qemu-devel/2020-06/msg00706.html (Patch, Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2020/06/04/1 (Patch, Mailing List, Third Party Advisory)
security.netapp.com/advisory/ntap-20200717-0001/ (Third Party Advisory)
security.gentoo.org/glsa/202011-09 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13791?: CVE-2020-13791 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2020-06-04.
How severe is CVE-2020-13791?: Medium severity. CVSS v3 base score is 5.5 out of 10.