CVE-2017-5957 [Medium] | Out-of-bounds Write in Virglrenderer

Stack-based buffer overflow in the vrend_decode_set_framebuffer_state function in vrend_decode.c in virglrenderer before 926b9b3460a48f6454d8bbe9e44313d86a65447f, as used in Quick Emulator (QEMU), allows a local guest users to cause a denial of service (application crash) via the "nr_cbufs" argument.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2023-03-07	0.95%	0.07%	-0.88%
2	2022-02-04	1.55%	0.95%	-0.60%
3	2021-04-14	—	1.55%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2023-03-07

0.95%

0.07%

-0.88%

2022-02-04

1.55%

0.95%

-0.60%

2021-04-14

—

1.55%

—

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-2017-5957

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2017-5957 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-2017-5957
`gentoo`	normal	CVE-2017-5957: 1 GLSA(s) (201707-06), 1 atom(s) (media-libs/virglrenderer); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-5957
`suse`	low	CVE-2017-5957 severity low: SUSE including 19 source package names (libvirglrenderer0-0.5.0-11.1, libvirglrenderer0-0.6.0-2.30, …), 44 product×package rows across 34 product lines (SUSE Linux Enterprise Desktop 12 SP2, SUSE Linux Enterprise Desktop 12 SP3, … (34 product lines)): Fixed 44.	https://www.suse.com/security/cve/CVE-2017-5957/
`ubuntu`	medium	CVE-2017-5957 medium priority: Ubuntu including 1 source packages (virglrenderer), 9 status rows across 9 suites (artful, bionic, cosmic, precise, trusty, upstream, xenial, yakkety, zesty): DNE 3, ignored 3, not-affected 2, released 1.	https://ubuntu.com/security/CVE-2017-5957

Affected software / configurations for CVE-2017-5957

Vendor	Product	Version	Raw CPE
virglrenderer_project	virglrenderer	< 0.6.0	cpe:2.3:a:virglrenderer_project:virglrenderer::::::::

References for CVE-2017-5957

URL	Tags
http://www.openwall.com/lists/oss-security/2017/02/13/3	Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/96215	Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1421126	Issue Tracking Patch Third Party Advisory VDB Entry
https://cgit.freedesktop.org/virglrenderer/commit/?id=926b9b3460a48f6454d8bbe9e44313d86a65447f	Patch Third Party Advisory
https://security.gentoo.org/glsa/201707-06	Third Party Advisory

URL

CVE-2017-5957

Exploit prediction scoring system (EPSS) score for CVE-2017-5957

Common vulnerability scoring system (CVSS) metrics for CVE-2017-5957

Weakness enumeration for CVE-2017-5957

OS Trackers for CVE-2017-5957

Affected software / configurations for CVE-2017-5957

References for CVE-2017-5957