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CVE-2016-9584

23
FAUCET Score

CVE-2016-9584 is a critical use-after-free vulnerability in libical, allowing remote attackers to cause a denial of service and potentially read heap memory through a specially crafted .ics file. With a CVSS score of 9.1, it presents a high-impact threat that can be exploited over the network without user interaction. Despite its severity, there is no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.0CPE matchmatch criteria
cpe:2.3:a:libical_project:libical:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.06%
Probability of exploitation in next 30 days
EPSS Percentile
79.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0206 is in the 68th percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

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

Vendor Advisories (1)

redhatCVE-2016-9584Moderate

libical: Use-after-free

Dec 15, 2016

References

openwall.com / lists/oss-security/2016/12/15/5
Mailing ListThird Party Advisory
securityfocus.com / bid/94948
Third Party AdvisoryVDB Entry