In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported
Published Oct 6, 2019
3.3
LOWCVSS 3.1
EPSS 0.52%
Description
In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported. NOTE: the vendor has disputed this as described in the GitHub issue
Affected products
No data.
- < 20191006
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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Jun 18, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.52% (0.00520) | 42.08th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.52% (0.00520) | 43.13th | v5 (v2026.06.15) |
| Jul 19, 2024 | 0.07% (0.00072) | 31.45th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.07% (0.00072) | 31.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00072) | 29.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01412) | 50.22th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Jan 5, 2022 | 0.83% (0.00833) | 58.90th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (3)
- http://packetstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- https://github.com/libyal/libfwsi/compare/20181227...20191006 x_refsource_MISCPatchThird Party Advisory
- https://github.com/libyal/libfwsi/issues/13 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| https://github.com/libyal/libfwsi/compare/20181227...20191006 | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/libyal/libfwsi/issues/13 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.