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CVE-2016-4579

26
FAUCET Score

CVE-2016-4579 is a denial-of-service vulnerability affecting Libksba versions prior to 1.3.4, specifically impacting Canonical, GnuPG, and OpenSUSE distributions. This flaw, stemming from an out-of-bounds read during BER parsing, allows unauthenticated remote attackers to crash affected systems. With a CVSSv3 score of 7.5 (High), it presents a significant availability risk with low attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.3CPE matchmatch criteria
cpe:2.3:a:gnupg:libksba:*:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
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:*:*:*
15.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.21%
Probability of exploitation in next 30 days
EPSS Percentile
86.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0321 is in the 76th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libksba
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libksba
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libksba

Vendor Advisories (1)

redhatCVE-2016-4579Moderate

libksba: Out-of-bounds read in _ksba_ber_parse_tl

May 10, 2016

References

git.gnupg.org / cgi-bin/gitweb.cgi
lists.opensuse.org / opensuse-updates/2016-06/msg00028.html
security.gentoo.org / glsa/201706-22
openwall.com / lists/oss-security/2016/05/10/8
openwall.com / lists/oss-security/2016/05/11/10
ubuntu.com / usn/USN-2982-1