An invalid free in mb_detect_order can cause the application to crash or potentially result in remote code execution.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• facebook hhvmbefore 3.30.12
• facebook hhvm4.0.0 and later · up to 4.8.5 inclusive
• facebook hhvm4.9.0 and later · up to 4.23.1 inclusive
• facebook hhvm4.24.0
• facebook hhvm4.25.0
• facebook hhvm4.26.0
• facebook hhvm4.27.0
• facebook hhvm4.28.0
• facebook hhvm4.28.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (facebook). Independent of NVD's CPE analysis and usually ahead of it.

• Facebook HHVM

  • 4.28.2, 4.27.1, 4.26.1, 4.25.1, 4.24.1, 4.23.2, 4.8.6, 3.30.12affected
  • 4.28.0 and later · before unspecifiedaffected
  • 4.27.0 and later · before unspecifiedaffected
  • 4.26.0 and later · before unspecifiedaffected
  • 4.25.0 and later · before unspecifiedaffected
  • 4.24.0 and later · before unspecifiedaffected
  • 4.9.0 and later · before unspecifiedaffected
  • 4.0.0 and later · before unspecifiedaffected
  • unspecified and later · before 3.30.12affected

Other highest-scoring records for the same primary product.

• CVE-2019-11929Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading
  40Plan
• CVE-2019-11926Insufficient boundary checks when processing M_SOFx markers from JPEG headers in the GD extension could allow access to out-of-bounds memory
  40Plan
• CVE-2019-11925Insufficient boundary checks when processing the JPEG APP12 block marker in the GD extension could allow access to out-of-bounds memory via
  40Plan
• CVE-2019-3561Insufficient boundary checks for the strrpos and strripos functions allow access to out-of-bounds memory.
  40Plan
• CVE-2019-3557The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 consistently.
  40Plan
• CVE-2018-6345The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large.
  40Plan

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.