CVE-2014-6229: n/a vulnerability

CVE-2014-6229: The HashContext class in hphp/runtime/ext/ext_hash.cpp in Facebook HipHop Virtual Machine (HHVM) before 3.3...

The HashContext class in hphp/runtime/ext/ext_hash.cpp in Facebook HipHop Virtual Machine (HHVM) before 3.3.0 incorrectly expects that a certain key string uses '\0' for termination, which allows remote attackers to obtain sensitive information by leveraging read access beyond the end of the string, and makes it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging truncation of a string containing an internal '\0' character.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 12:10 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2014-6229 affects Facebook HHVM before 3.3.0. A string-handling mistake in hashing code could let a remote attacker read beyond expected string boundaries or weaken cryptographic protections when strings contain internal null characters. The sources do not provide a CVSS score or confirmed exploitation evidence. Exposure appears limited to deployments running Facebook HHVM before 3.3.0. The source bundle does not identify affected downstream products, package names, or required application-level conditions beyond use of the vulnerable HHVM hashing implementation. Prioritize remediation where HHVM is internet-facing, processes sensitive data, or supports authentication or cryptographic workflows. If HHVM is absent, record the CVE as not applicable after inventory validation. Mitigation focus: Identify any HHVM deployments and record exact runtime versions.; Upgrade HHVM instances before 3.3.0 to 3.3.0 or later.; Review vendor release notes and the referenced commit for fix confirmation..

Prepared: Jun 14, 2026, 05:41 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 28, 2014, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://github.com/facebook/hhvm/commit/7135ec229882370a00411aa50030eada6034cc1bCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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