HOMEVULNERABILITIESCVE-2019-11930
CRITICAL

CVE-2019-11930

CWE-763Published: December 4, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-11930 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

facebook1 product(s)
hhvm
Source: NVD CPE · 7 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36
PATCHhttps://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36
ADVISORYhttps://hhvm.com/blog/2019/10/28/security-update.html
ADVISORYhttps://www.facebook.com/security/advisories/cve-2019-11930
ADVISORYhttps://hhvm.com/blog/2019/10/28/security-update.html
ADVISORYhttps://www.facebook.com/security/advisories/cve-2019-11930

All References (6)

→
https://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36Patch
→
https://hhvm.com/blog/2019/10/28/security-update.htmlVendor Advisory
→
https://www.facebook.com/security/advisories/cve-2019-11930Vendor Advisory
→
https://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36Patch
→
https://hhvm.com/blog/2019/10/28/security-update.htmlVendor Advisory
→
https://www.facebook.com/security/advisories/cve-2019-11930Vendor Advisory

Quick Facts

CVE IDCVE-2019-11930
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-763
CISA KEVNo
Affected1 vendor(s)
PublishedDec 4, 2019

Related CVEs (CWE-763)

CVE-2021-30473
9.8
CVE-2020-0103
9.8
CVE-2024-44852
9.8
CVE-2020-11105
9.8
CVE-2021-24028
9.8
CVE-2018-6836
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11930 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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