What is CVE-2014-8146?

CVE-2014-8146 is a vulnerability in Apple Iphone OS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2015-05-25.

Is CVE-2014-8146 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Apple Iphone OS

CVE-2014-8146

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.

Vulnerability class: Buffer Overflow

Published 2015-05-25 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.243 (97.8th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.245 · newest: 0.243 · change: -0.002

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

support.apple.com/HT205221 (Third Party Advisory)
raw.githubusercontent.com/pedrib/PoC/master/generic/i-c-u-fail.txt (Exploit)
bugs.icu-project.org/trac/changeset/37162 (Issue Tracking, Vendor Advisory)
support.apple.com/HT205212 (Third Party Advisory)
lists.apple.com/archives/security-announce/2015/Sep/msg00008.html (vendor-advisory, Mailing List)
www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html (Patch)
security.gentoo.org/glsa/201507-04 (vendor-advisory, Third Party Advisory)
www.kb.cert.org/vuls/id/602540 (US Government Resource, Third Party Advisory, third-party-advisory)
support.apple.com/HT205267 (Third Party Advisory)
seclists.org/fulldisclosure/2015/May/14 (mailing-list, Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2014-8146?: CVE-2014-8146 is a vulnerability in Apple Iphone OS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2015-05-25.
Is CVE-2014-8146 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.