CVE-2019-11930
An invalid free in mb_detect_order can cause the application to crash or potentially result in remote code execution.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.25% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-763
- Affected
- facebook/hhvm
- Source
- cve-assign@fb.com
EPSS 3.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.