CVE-2016-3982 [High] | Memory Corruption in Leap

Off-by-one error in the bmp_rle4_fread function in pngxrbmp.c in OptiPNG before 0.7.6 allows remote attackers to cause a denial of service (out-of-bounds read or write access and crash) or possibly execute arbitrary code via a crafted image file, which triggers a heap-based buffer overflow.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-13	2.21%	2.51%	+0.30%
2	2026-01-21	1.70%	2.21%	+0.51%
3	2025-12-28	—	1.70%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-13

2.21%

2.51%

+0.30%

2026-01-21

1.70%

2.21%

+0.51%

2025-12-28

—

1.70%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/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:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/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:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2016-3982

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2016-3982 not yet assigned priority: Debian including 1 source packages (optipng), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-3982
`gentoo`	normal	CVE-2016-3982: 1 GLSA(s) (201608-01), 1 atom(s) (media-gfx/optipng); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-3982
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2016-3982
`ubuntu`	medium	CVE-2016-3982 medium priority: Ubuntu including 1 source packages (optipng), 4 status rows across 4 suites (precise, trusty, upstream, wily): released 4.	https://ubuntu.com/security/CVE-2016-3982

Affected software / configurations for CVE-2016-3982

Vendor	Product	Version	Raw CPE
opensuse	leap	42.1	cpe:2.3:o:opensuse:leap:42.1:::::::*
opensuse	opensuse	13.2	cpe:2.3:o:opensuse:opensuse:13.2:::::::*
debian	debian_linux	7.0	cpe:2.3:o:debian:debian_linux:7.0:::::::*
debian	debian_linux	8.0	cpe:2.3:o:debian:debian_linux:8.0:::::::*
optipng_project	optipng	<= 0.7.5	cpe:2.3:a:optipng_project:optipng::::::::
canonical	ubuntu_linux	12.04	cpe:2.3:o:canonical:ubuntu_linux:12.04::::lts:::
canonical	ubuntu_linux	14.04	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
canonical	ubuntu_linux	15.10	cpe:2.3:o:canonical:ubuntu_linux:15.10:::::::*

References for CVE-2016-3982

URL	Tags
http://bugs.fi/media/afl/optipng/2/	Issue Tracking
http://lists.opensuse.org/opensuse-updates/2016-04/msg00061.html	Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-04/msg00065.html	Third Party Advisory
http://www.debian.org/security/2016/dsa-3546	Third Party Advisory
http://www.ubuntu.com/usn/USN-2951-1	Third Party Advisory
https://security.gentoo.org/glsa/201608-01
https://sourceforge.net/p/optipng/bugs/57/	Patch Vendor Advisory

URL

CVE-2016-3982

Exploit prediction scoring system (EPSS) score for CVE-2016-3982

Common vulnerability scoring system (CVSS) metrics for CVE-2016-3982

Weakness enumeration for CVE-2016-3982

OS Trackers for CVE-2016-3982

Affected software / configurations for CVE-2016-3982

References for CVE-2016-3982