The resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C in International…

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.

Scores

EPSS (exploitation in 30 days)

24.7% · top 2.1% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-119 (opens in a new tab)All about CWE-119 and its CVEs

Affected products

• n/a

  • affected n/a

References (19)

• https://support.apple.com/HT205221 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://raw.githubusercontent.com/pedrib/PoC/master/generic/i-c-u-fail.txt (opens in a new tab)x_refsource_MISCx_transferred
• http://bugs.icu-project.org/trac/changeset/37162 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://support.apple.com/HT205212 (opens in a new tab)x_refsource_CONFIRMx_transferred
• APPLE-SA-2015-09-30-3 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• GLSA-201507-04 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• VU#602540 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• https://support.apple.com/HT205267 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 20150505 [CVE-2014-8146/8147] - ICU heap and integer overflows / I-C-U-FAIL (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
• APPLE-SA-2015-09-21-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• APPLE-SA-2015-09-16-3 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• [oss-security] 20150505 [CVE-2014-8146/8147] - ICU heap and integer overflows / I-C-U-FAIL (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://support.apple.com/HT205213 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 74457 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• APPLE-SA-2015-09-16-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• DSA-3323 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2014-8146](https://trackcve.app/badge/CVE-2014-8146.svg)](https://trackcve.app/cve/CVE-2014-8146)

Record last updated 6 Aug 2024, 13:10 UTC.