CVE-2014-8146International Components For Unicode Memory Corruption
The resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C in International Components for Unicode (ICU) before 55.1 does not properly track directionally isolated pieces of text, which allows remote attackers to cause a…
Published Sep 13, 2021 · Updated Aug 11, 2026 · Also known as DEBIAN-CVE-2014-8146, DSA-3323-1, SUSE-SU-2015:1915-1, SUSE-SU-2016:0324-1, SUSE-SU-2017:2318-1, SUSE-SU-2018:1401-1, SUSE-SU-2018:1401-2, TR-21-0731, UBUNTU-CVE-2014-8146, USN-2605-1
Key Facts
Patch immediately- CVE-2014-8146 is a high-severity vulnerability (CVSS 7.5 v2) affecting Itunes (Apple), International Components For Unicode (Icu-Project), Iphone OS (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 25% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache-commons-logging 1.1.3-7.1, Iphone OS 8.2, Itunes 12.1.3.
- 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)
25%
Higher than 97.8% 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-2014-8146
- advisoryhttps://ubuntu.com/security/CVE-2014-8146
- advisoryhttps://www.cve.org/CVERecord?id=CVE-2014-8146
- advisoryhttp://bugs.icu-project.org/trac/changeset/37162
- 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 does not properly track directionally isolated pieces of text, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly execute arbitrary code via crafted text.
Affected Products
1,418 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ItunesApple | See advisory | 12.1.3 |
| International Components For UnicodeIcu-Project | See advisory | 55.1 |
| Iphone OSApple | See advisory | 8.2 |
| Mac OS XApple | See advisory | 10.10.4 |
| WatchosApple | See advisory | 1.0.1 |
Patched Releases
apache-commons-logging
1.1.3-7.1
Iphone OS
8.2
Itunes
12.1.3
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
Timeline
Publicly disclosed
Sep 13, 2021
Last updated
Aug 11, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-122 Heap-based Buffer Overflow
- CWE-787 Out-of-bounds Write
References
- advisorysecurity-tracker.debian.org · CVE-2014-8146
- advisoryubuntu.com · CVE-2014-8146
- advisorycve.org · CVERecord
- advisorybugs.icu-project.org · 37162
- 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 does not properly track directionally isolated pieces of text, which allows remote attackers to cause a denial of service (heap-based buffer over…
Affected: Itunes (Apple); International Components For Unicode (Icu-Project); Iphone OS (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, Iphone OS 8.2, Itunes 12.1.3.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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