The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large
Published Jan 15, 2019
9.8
CRITICALCVSS 3.1
EPSS 1.75%
Description
The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).
Affected products
-
- Version 3.27.6StatusaffectedConstraints-
- Version 3.30.0StatusaffectedConstraints<unspecified
- Version 3.30.2StatusaffectedConstraints-
- Version unspecifiedStatusaffectedConstraints<3.27.6
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.75% (0.01748) | 76.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.75% (0.01748) | 74.82th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.24% (0.00244) | 64.91th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.24% (0.00244) | 63.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00244) | 60.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v1 |
| Jan 6, 2022 | 0.62% (0.00624) | 17.24th | v1 |
| Sep 1, 2021 | 0.62% (0.00624) | 45.04th | v1 |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3 x_refsource_MISCPatchThird Party Advisory
- https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html x_refsource_MISCRelease NotesVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3 | x_refsource_MISCPatchThird Party Advisory | |
| https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html | x_refsource_MISCRelease NotesVendor Advisory |
Change history (0)
No recorded changes yet.