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An invalid free in mb_detect_order can cause the...

High severity Unreviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Mar 16, 2026

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

An invalid free in mb_detect_order can cause the application to crash or potentially result in remote code execution. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.

References

Published by the National Vulnerability Database Dec 4, 2019
Published to the GitHub Advisory Database May 24, 2022
Last updated Mar 16, 2026

Severity

High

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(85th percentile)

Weaknesses

Release of Invalid Pointer or Reference

The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly. Learn more on MITRE.

CVE ID

CVE-2019-11930

GHSA ID

GHSA-5h4f-x39p-f6v8

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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