CVE-2016-3977 [Medium] | Memory Corruption in Opensuse

CVE-2016-3977 is rated Moderate Risk (51.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.11%). EPSS rose +1.39% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.73%	2.11%	+1.39%
2	2026-05-27	0.84%	0.73%	-0.12%
3	2026-04-27	—	0.84%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.73%

2.11%

+1.39%

2026-05-27

0.84%

0.73%

-0.12%

2026-04-27

—

0.84%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.0	MEDIUM	`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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]
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. 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.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.0

MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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]

4.3

2.0

MEDIUM

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

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
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.

8.6

2.9

[email protected]

OS Trackers for CVE-2016-3977

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2016-3977 not yet assigned priority: Debian including 1 source packages (giflib), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-3977
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2016-3977
`suse`	medium	CVE-2016-3977 severity moderate: SUSE including 273 source package names (10.1.33-openjdk11-59.4:libgif7-5.2.1-150000.4.8.1, 10.1.33-openjdk17-59.4:libgif7-5.2.1-150000.4.8.1, …), 391 product×package rows across 75 product lines (Container bci/openjdk, Container bci/openjdk-devel, … (75 product lines)): Known Affected 231, Fixed 160.	https://www.suse.com/security/cve/CVE-2016-3977/
`ubuntu`	low	CVE-2016-3977 low priority: Ubuntu including 1 source packages (giflib), 11 status rows across 11 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, wily, xenial, yakkety, zesty): ignored 6, not-affected 2, DNE 1, needs-triage 1, released 1.	https://ubuntu.com/security/CVE-2016-3977

Affected software / configurations for CVE-2016-3977

Vendor	Product	Version	Raw CPE
opensuse	opensuse	13.2	cpe:2.3:o:opensuse:opensuse:13.2:::::::*
giflib_project	giflib	<= 5.1.2	cpe:2.3:a:giflib_project:giflib::::::::

References for CVE-2016-3977

URL	Tags
http://bugs.fi/fuzzing/index.html
http://lists.opensuse.org/opensuse-updates/2016-04/msg00079.html
http://lists.opensuse.org/opensuse-updates/2016-04/msg00084.html
http://lists.opensuse.org/opensuse-updates/2016-05/msg00019.html
http://www.securityfocus.com/bid/88103
https://bugzilla.redhat.com/show_bug.cgi?id=1325771
https://sourceforge.net/p/giflib/bugs/87/	Patch
https://sourceforge.net/p/giflib/code/ci/ea8dbc5786862a3e16a5acfa3d24e2c2f608cd88/	Patch Vendor Advisory
https://usn.ubuntu.com/4107-1/

URL

CVE-2016-3977

Exploit prediction scoring system (EPSS) score for CVE-2016-3977

Common vulnerability scoring system (CVSS) metrics for CVE-2016-3977

Weakness enumeration for CVE-2016-3977

OS Trackers for CVE-2016-3977

Affected software / configurations for CVE-2016-3977

References for CVE-2016-3977