CVE-2014-8147International Components For Unicode Integer Overflow
The resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C in International Components for Unicode (ICU) before 55.1 uses an integer data type that is inconsistent with a header file, which allows remote attackers to cause…
Published Sep 13, 2021 · Updated Aug 11, 2026 · Also known as DEBIAN-CVE-2014-8147, UBUNTU-CVE-2014-8147
Key Facts
Patch immediately- CVE-2014-8147 is a high-severity vulnerability (CVSS 7.5 v2) affecting International Components For Unicode (Icu-Project), Mac OS X (Apple), Watchos (Apple) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. A public exploit is reported by tracking sources, but no code link is listed yet.
- EPSS estimates a 24% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache-commons-logging 1.1.3-7.1, Mac OS X 10.10.4, Watchos 1.0.1.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
24%
Higher than 97.7% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
40/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Advisories And Exploit References
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2014-8147
- advisoryhttps://ubuntu.com/security/CVE-2014-8147
- advisoryhttps://www.cve.org/CVERecord?id=CVE-2014-8147
- advisoryhttp://bugs.icu-project.org/trac/changeset/37080
- advisoryhttps://bugzilla.suse.com/1034674
- advisoryhttps://bugzilla.suse.com/1034678
Description
The resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C in International Components for Unicode (ICU) before 55.1 uses an integer data type that is inconsistent with a header file, which allows remote attackers to cause a denial of service (incorrect malloc followed by invalid free) or possibly execute arbitrary code via crafted text.
Affected Products
1,416 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| International Components For UnicodeIcu-Project | See advisory | 55.1 |
| Mac OS XApple | See advisory | 10.10.4 |
| WatchosApple | See advisory | 1.0.1 |
| icudebian | See advisory | 52.1-9 |
| rootio-icurootio | See advisory | 52.1-9 |
Patched Releases
apache-commons-logging
1.1.3-7.1
Mac OS X
10.10.4
Watchos
1.0.1
calibre
2.46.0-11.1
cmis-client
0.5.0-4.3.2, 0.5.0-5.1
cmis-client-debuginfo
0.5.0-4.3.2
cmis-client-debugsource
0.5.0-4.3.2
fcitx-qt5
1.0.4-6.3
fcitx-qt5-32bit
1.0.4-6.3
fcitx-qt5-devel
1.0.4-6.3
flute
1.3.0-4.2
frameworkintegration
5.16.0-6.3
frameworkintegration-devel
5.16.0-6.3
frameworkintegration-devel-32bit
5.16.0-6.3
frameworkintegration-plugin
5.16.0-6.3
frameworkintegration-plugin-32bit
5.16.0-6.3
google-carlito-fonts
1.1.03.beta1-2.1
graphite2
1.3.1-3.1
graphite2-devel
1.3.1-3.1
hyphen
2.8.8-2.1, 2.8.8-9.1
hyphen-devel
2.8.8-2.1, 2.8.8-9.1
icu
4.8.1.1-12+deb7u3, 52.1-15.1, 52.1-18.1, 52.1-3ubuntu0.3, 52.1-8.3.1, 52.1-8.7.1, 52.1-8+deb8u2, 52.1-9
icu-data
52.1-15.1, 52.1-18.1
International Components For Unicode
55.1
kwayland
5.4.3-6.3
Timeline
Publicly disclosed
Sep 13, 2021
Last updated
Aug 11, 2026
Weakness Type
- CWE-189
- CWE-190 Integer Overflow or Wraparound
References
- advisorysecurity-tracker.debian.org · CVE-2014-8147
- advisoryubuntu.com · CVE-2014-8147
- advisorycve.org · CVERecord
- advisorybugs.icu-project.org · 37080
- advisorybugzilla.suse.com · 1034674
FAQ
Common Questions.
The resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C in International Components for Unicode (ICU) before 55.1 uses an integer data type that is inconsistent with a header file, which allows remote attackers to cause a denial of service (incorrect malloc f…
Affected: International Components For Unicode (Icu-Project); Mac OS X (Apple); Watchos (Apple), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
A public exploit is reported by tracking sources, but no code link is listed yet.
Fixed versions are available, including apache-commons-logging 1.1.3-7.1, Mac OS X 10.10.4, Watchos 1.0.1.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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