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CVE-2016-2191

24
FAUCET Score

CVE-2016-2191 is a denial-of-service vulnerability affecting OptiPNG versions prior to 0.7.6, as well as canonical, debian, and opensuse distributions. A remote attacker can trigger an invalid memory write and crash by providing a crafted BMP image containing a series of delta escapes. Rated Medium (CVSS 6.5), this vulnerability requires user interaction (UI:R) and has a high impact on availability (A:H). There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
0.7.2CPE matchmatch criteria
cpe:2.3:a:optipng:optipng:0.7.2:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
15.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.52%
Probability of exploitation in next 30 days
EPSS Percentile
88.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0352 is in the 95th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: optipng

Vendor Advisories (1)

redhatCVE-2016-2191Moderate

optipng: Invalid write while processing delta escapes without any boundary checking

Apr 4, 2016

References

lists.opensuse.org / opensuse-updates/2016-04/msg00061.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2016-04/msg00065.html
Third Party Advisory
packetstormsecurity.com / files/136553/Optipng-Invalid-Write.html
Exploit
seclists.org / fulldisclosure/2016/Apr/15
Third Party Advisory
security.gentoo.org / glsa/201608-01
sourceforge.net / p/optipng/bugs/59
Patch
debian.org / security/2016/dsa-3546
Third Party Advisory
openwall.com / lists/oss-security/2016/04/04/2
Third Party Advisory
securityfocus.com / archive/1/537972/100/0/threaded
ubuntu.com / usn/USN-2951-1
Third Party Advisory