Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading to remote code execution
Published Oct 2, 2019
9.8
CRITICALCVSS 3.1
EPSS 4.03%
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 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.
Affected products
-
- Version 3.30.11StatusaffectedConstraints-
- Version 4.0.0StatusaffectedConstraints<unspecified
- Version 4.18.3StatusaffectedConstraints-
- Version 4.19.0StatusaffectedConstraints<unspecified
- Version 4.19.2StatusaffectedConstraints-
- Version 4.20.0StatusaffectedConstraints<unspecified
- Version 4.20.3StatusaffectedConstraints-
- Version 4.21.0StatusaffectedConstraints<unspecified
- Version 4.21.1StatusaffectedConstraints-
- Version 4.22.0StatusaffectedConstraints<unspecified
- Version 4.22.1StatusaffectedConstraints-
- Version 4.23.0StatusaffectedConstraints<unspecified
- Version 4.23.2StatusaffectedConstraints-
- Version 4.24.0StatusaffectedConstraints-
- Version 4.8.5StatusaffectedConstraints-
- Version 4.9.0StatusaffectedConstraints<unspecified
- Version unspecifiedStatusaffectedConstraints<=3.30.10
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HHVM | n/a |
|
- < 3.30.10
- ≥ 4.0.0 · ≤ 4.8.5
- ≥ 4.9.0 · ≤ 4.18.2
- 4.19.0
- 4.19.1
- 4.20.0
- 4.20.1
- 4.20.2
- 4.21.0
- 4.22.0
- 4.23.0
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 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 4.03% (0.04028) | 90.29th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.03% (0.04028) | 89.23th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.89% (0.03885) | 87.18th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.13% (0.12129) | 89.67th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.89% (0.03885) | 87.48th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.18% (0.03180) | 90.94th | v3 (v2023.03.01) |
| Sep 25, 2024 | 7.10% (0.07099) | 94.12th | v3 (v2023.03.01) |
| Aug 6, 2023 | 6.00% (0.05997) | 92.48th | v3 (v2023.03.01) |
| Jul 22, 2023 | 4.89% (0.04888) | 91.72th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.68% (0.04680) | 91.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.63% (0.05634) | 90.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.63% (0.05634) | 89.29th | v2 (v2022.01.01) |
| Feb 4, 2022 | 46.46% (0.46456) | 97.91th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.71% (0.07710) | 84.59th | v1 |
| Jan 6, 2022 | 7.71% (0.07710) | 84.41th | v1 |
| Sep 1, 2021 | 1.83% (0.01828) | 74.99th | v1 |
| Apr 14, 2021 | 1.83% (0.01828) | 0.00th | v1 |
References (3)
- https://github.com/facebook/hhvm/commit/dbeb9a56a638e3fdcef8b691c2a2967132dae692 x_refsource_CONFIRMPatchThird Party Advisory
- https://hhvm.com/blog/2019/09/25/security-update.html x_refsource_CONFIRMVendor Advisory
- https://www.facebook.com/security/advisories/cve-2019-11929 x_refsource_CONFIRMThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/facebook/hhvm/commit/dbeb9a56a638e3fdcef8b691c2a2967132dae692 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://hhvm.com/blog/2019/09/25/security-update.html | x_refsource_CONFIRMVendor Advisory | |
| https://www.facebook.com/security/advisories/cve-2019-11929 | x_refsource_CONFIRMThird Party Advisory |
Change history (0)
No recorded changes yet.