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01 Record

CVE-2019-11929

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

UnratedPUBLISHEDCNA: facebook
CNA base scoreUnratedNo CNA CVSS vector

02 Description

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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
4.02% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 90.2% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2019-10-02 19:07Z7 YR AGO
Last updated
2024-08-04 23:10Z2 YR AGO
Reserved
2019-05-13
Assigning CNA
facebook
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
Data version
5.1
Document digest
271196ca993eb18062eeaed110df2f2c9f4b6676b90b0ebd305bcd0224225032

05 Affected products

VendorProductVersionsPlatforms
FacebookHHVM4.24.0, 4.23.2, 4.23.0 to < unspecified, 4.22.1, 4.22.0 to < unspecified, 4.21.1, 4.21.0 to < unspecified, 4.20.3, 4.20.0 to < unspecified, 4.19.2, 4.19.0 to < unspecified, 4.18.3, 4.9.0 to < unspecified, 4.8.5, 4.0.0 to < unspecified, 3.30.11, <= 3.30.10—

06 References

07 Fixed in

Ubuntu 16.04 LTS

  • hhvm
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • hhvm
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.