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TI-2019-08934 Aliases CVE-2019-11929GHSA-r5v6-3r34-h6vr

Memory corruption in Meta HHVM

Priority MEDIUM 49CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading to remote code execution. This issue affects HHVM versions prior to 3.30.10, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.18.2, and versions 4.19.0, 4.19.1, 4.20.0, 4.20.1, 4.20.2, 4.21.0, 4.22.0, 4.23.0.

Why it matters now

EPSS 0.04028 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MetaHHVM4.24.0; 4.23.2; 4.23.0 and later; 4.22.1; 4.22.0 and later; 4.21.1; 4.21.0 and later; 4.20.3; 4.20.0 and later; 4.19.2; 4.19.0 and later; 4.18.3; 4.9.0 and later; 4.8.5; 4.0.0 and later; 3.30.11; up to 3.30.10—No fix listedCNA
  • HHVM VendorMeta Affected 4.24.0; 4.23.2; 4.23.0 and later; 4.22.1; 4.22.0 and later; 4.21.1; 4.21.0 and later; 4.20.3; 4.20.0 and later; 4.19.2; 4.19.0 and later; 4.18.3; 4.9.0 and later; 4.8.5; 4.0.0 and later; 3.30.11; up to 3.30.10 Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*before 3.30.10; 4.0.0 – 4.8.5; 4.9.0 – 4.18.2VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.19.0:*:*:*:*:*:*:*4.19.0VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.19.1:*:*:*:*:*:*:*4.19.1VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.20.0:*:*:*:*:*:*:*4.20.0VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.20.1:*:*:*:*:*:*:*4.20.1VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.20.2:*:*:*:*:*:*:*4.20.2VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.21.0:*:*:*:*:*:*:*4.21.0VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.22.0:*:*:*:*:*:*:*4.22.0VulnerableMeta
cpe:2.3:a:facebook:hhvm:4.23.0:*:*:*:*:*:*:*4.23.0VulnerableMeta
  • cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* Versions before 3.30.10; 4.0.0 – 4.8.5; 4.9.0 – 4.18.2 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.19.0:*:*:*:*:*:*:* Versions 4.19.0 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.19.1:*:*:*:*:*:*:* Versions 4.19.1 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.20.0:*:*:*:*:*:*:* Versions 4.20.0 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.20.1:*:*:*:*:*:*:* Versions 4.20.1 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.20.2:*:*:*:*:*:*:* Versions 4.20.2 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.21.0:*:*:*:*:*:*:* Versions 4.21.0 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.22.0:*:*:*:*:*:*:* Versions 4.22.0 Vulnerable ·Meta
  • cpe:2.3:a:facebook:hhvm:4.23.0:*:*:*:*:*:*:* Versions 4.23.0 Vulnerable ·Meta

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-11929
  2. 2026-10-03 Alias added: GHSA-r5v6-3r34-h6vr

References

Patch 1

Advisory 2

  • TI-2018-04659 Improper input validation in Meta HHVM CVSS 3.1CRITICAL 9.8
  • TI-2022-17147 Broken or risky cryptographic algorithm in Meta HHVM CVSS 3.1CRITICAL 9.8
  • TI-2021-06352 Heap-based buffer overflow in Meta folly CVSS 3.1CRITICAL 9.8
  • TI-2019-08935 An invalid free in mb_detect_order can cause the application to crash or potentially… CVSS 3.1CRITICAL 9.8
  • TI-2016-05898 Integer overflow in bcmath in Facebook HHVM before 3.15.0 allows attackers to have… CVSS 3.0CRITICAL 9.8
  • TI-2019-08931 Memory corruption in Meta HHVM CVSS 3.0CRITICAL 9.8
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences