What is CVE-2019-18391?

CVE-2019-18391 is a medium-severity vulnerability in Virglrenderer Project, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2019-12-23.

How severe is CVE-2019-18391?

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

Is CVE-2019-18391 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Virglrenderer Project

CVE-2019-18391

A heap-based buffer overflow in the vrend_renderer_transfer_write_iov function in vrend_renderer.c in virglrenderer through 0.8.0 allows guest OS users to cause a denial of service via VIRGL_CCMD_RESOURCE_INLINE_WRITE commands.

Vulnerability class: Buffer Overflow

Published 2019-12-23 · 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 (27.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.6% 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

Virglrenderer Project
Debian Linux — versions 10.0
openSUSE Leap — versions 15.1
Red Hat Enterprise Linux — versions 8.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2019-18391

References

gitlab.freedesktop.org/virgl/virglrenderer/merge_requests/314/diffs (Third Party Advisory)
gitlab.freedesktop.org/virgl/virglrenderer/commit/2abeb1802e3c005b17a7123e38217… (Patch, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
access.redhat.com/security/cve/cve-2019-18391 (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-01/msg00028.html (vendor-advisory, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/12/msg00017.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-18391?: CVE-2019-18391 is a medium-severity vulnerability in Virglrenderer Project, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2019-12-23.
How severe is CVE-2019-18391?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2019-18391 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.