CVE-2019-18391 [Medium] | Out-of-bounds Write in Virglrenderer

CVE-2019-18391 is rated Low Risk (32.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-12-09	0.03%	0.11%	+0.08%
2	2025-11-21	0.09%	0.03%	-0.07%
3	2025-11-18	—	0.09%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-12-09

0.03%

0.11%

+0.08%

2025-11-21

0.09%

0.03%

-0.07%

2025-11-18

—

0.09%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]
2.1	2.0	LOW	`AV:L/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:L) Requires local access to the target system. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	3.9	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

2.1

2.0

LOW

AV:L/AC:L/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:L): Requires local access to the target system.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

3.9

2.9

[email protected]

OS Trackers for CVE-2019-18391

vendor	priority	summary	link
`alpine`	medium	CVE-2019-18391: 1 source package rows (virglrenderer); 8 state rows across 8 repos (3.11-main, 3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 8, open 0.	https://security.alpinelinux.org/vuln/CVE-2019-18391
`debian`	not yet assigned	CVE-2019-18391 not yet assigned priority: Debian including 1 source packages (virglrenderer), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2019-18391
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2019-18391
`suse`	high	CVE-2019-18391 severity important: SUSE including 21 source package names (0.38.1:libvirglrenderer0-0.6.0-4.3.1, libvirglrenderer0-0.5.0-12.3.1, …), 58 product×package rows across 46 product lines (Container suse/sles/15.2/virt-launcher, HPE Helion OpenStack 8, … (46 product lines)): Fixed 58.	https://www.suse.com/security/cve/CVE-2019-18391/
`ubuntu`	medium	CVE-2019-18391 medium priority: Ubuntu including 1 source packages (virglrenderer), 7 status rows across 7 suites (bionic, disco, eoan, focal, trusty, upstream, xenial): ignored 3, DNE 2, not-affected 1, released 1.	https://ubuntu.com/security/CVE-2019-18391

Affected software / configurations for CVE-2019-18391

Vendor	Product	Version	Raw CPE
virglrenderer_project	virglrenderer	<= 0.8.0	cpe:2.3:a:virglrenderer_project:virglrenderer::::::::
opensuse	leap	15.1	cpe:2.3:o:opensuse:leap:15.1:::::::*
redhat	enterprise_linux	8.0	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*

References for CVE-2019-18391

URL	Tags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00028.html	Mailing List Third Party Advisory
https://access.redhat.com/security/cve/cve-2019-18391	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1765589	Issue Tracking Patch Third Party Advisory
https://gitlab.freedesktop.org/virgl/virglrenderer/commit/2abeb1802e3c005b17a7123e382171b3fb665971	Patch Third Party Advisory
https://gitlab.freedesktop.org/virgl/virglrenderer/merge_requests/314/diffs?commit_id=8c9cfb4e425542e96f0717189fe4658555baaf08	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00017.html	Mailing List Third Party Advisory

URL

CVE-2019-18391

Exploit prediction scoring system (EPSS) score for CVE-2019-18391

Common vulnerability scoring system (CVSS) metrics for CVE-2019-18391

Weakness enumeration for CVE-2019-18391

OS Trackers for CVE-2019-18391

Affected software / configurations for CVE-2019-18391

References for CVE-2019-18391