9.1

CVE-2016-9584: libical_project libical Use After Free

Modified
AliasesUBUNTU-CVE-2016-9584DEBIAN-CVE-2016-9584
Published 18-01-2017Last modified 06-08-2024

Vulnerability summary

CVE-2016-9584 is a critical (CVSS 9.1) Use After Free vulnerability in libical_project libical. EPSS estimates a 2.32% chance of exploitation in the next 30 days, higher than 83.4% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.1 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v3.0 (NVD)
EPSS score
2.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 2
DLA-959-1MGASA-2018-0021SUSE-SU-2017:1989-1SUSE-SU-2018:0119-1

Timeline

  1. 18-01-2017
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

libical allows remote attackers to cause a denial of service (use-after-free) and possibly read heap memory via a crafted ics file.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.32%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.32% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • libical3< 3.0.1-1
Libical_project1 product
Ubuntu1 product
  • libicalAll versions (No fix recorded)

3 vendors · 3 products

References

5 links