folly::secureRandom will re-use a buffer between parent and child processes when fork() is called
Published Dec 31, 2018
7.5
HIGHCVSS 3.1
EPSS 1.78%
Description
folly::secureRandom will re-use a buffer between parent and child processes when fork() is called. That will result in multiple forked children producing repeat (or similar) results. This affects HHVM 3.26 prior to 3.26.3 and the folly library between v2017.12.11.00 and v2018.08.09.00.
Affected products
-
- Version 3.26.0StatusaffectedConstraints<unspecified
- Version 3.26.3StatusaffectedConstraints-
- Version unspecifiedStatusunaffectedConstraints<3.26.0
- Version
-
- Version v2017.12.11.00StatusaffectedConstraints<unspecified
- Version v2018.08.09.00StatusaffectedConstraints-
- Version unspecifiedStatusunaffectedConstraints<v2017.12.11.00
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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:N/I:H/A:N
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed May 6, 2025 · SSVC 2.0.3
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 v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.78% (0.01778) | 77.42th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.78% (0.01778) | 77.23th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.19% (0.00186) | 56.20th | v3 (v2023.03.01) |
| May 23, 2024 | 0.19% (0.00186) | 55.69th | v3 (v2023.03.01) |
| Dec 25, 2023 | 0.18% (0.00175) | 54.66th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.17% (0.00167) | 51.61th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (3)
- https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f x_refsource_MISCPatchThird Party Advisory
- https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8 x_refsource_MISCPatchThird Party Advisory
- https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html x_refsource_MISCRelease NotesVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8 | x_refsource_MISCPatchThird Party Advisory | |
| https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html | x_refsource_MISCRelease NotesVendor Advisory |
Change history (0)
No recorded changes yet.