What is CVE-2020-11102?

CVE-2020-11102 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Write. CVSS score: 5.6/10. Published 2020-04-06.

How severe is CVE-2020-11102?

Medium severity. CVSS v3 base score is 5.6 out of 10.

Buffer overflow in Qemu

CVE-2020-11102

hw/net/tulip.c in QEMU 4.2.0 has a buffer overflow during the copying of tx/rx buffers because the frame size is not validated against the r/w data length.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.020 (79.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Qemu — versions 4.2.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

lists.gnu.org/archive/html/qemu-devel/2020-03/msg08322.html (Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2020/04/06/1 (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202005-02 (vendor-advisory)

Frequently asked questions

What is CVE-2020-11102?: CVE-2020-11102 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Write. CVSS score: 5.6/10. Published 2020-04-06.
How severe is CVE-2020-11102?: Medium severity. CVSS v3 base score is 5.6 out of 10.