In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in…
Priority LOW 17CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0054 45th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libfwsi_project:libfwsi:*:*:*:*:*:*:*:* | before 20191006 | Vulnerable | Libfwsi Project |
- cpe:2.3:a:libfwsi_project:libfwsi:*:*:*:*:*:*:*:* Versions before 20191006 Vulnerable ·Libfwsi Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-17263
- 2026-10-03 Alias added: GHSA-wpqw-8rxf-9cw7
References
Sources
- CVE-2019-17263 · CVE Program
- CVE-2019-17263 · NVD
- FIRST EPSS
- GHSA-wpqw-8rxf-9cw7 · GitHub Advisory Database · CC BY 4.0
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