An issue was discovered in fast_ber through v0.4.
Priority LOW 33CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.
Why it matters now
EPSS 0.00913 60th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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:fast_ber_project:fast_ber:*:*:*:*:*:*:*:* | up to 0.4 | Vulnerable | Fast Ber Project |
- cpe:2.3:a:fast_ber_project:fast_ber:*:*:*:*:*:*:*:* Versions up to 0.4 Vulnerable ·Fast Ber Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-23921
- 2026-10-03 Alias added: GHSA-5v8f-79pq-pg2j
References
Sources
- CVE-2020-23921 · CVE Program
- CVE-2020-23921 · NVD
- FIRST EPSS
- GHSA-5v8f-79pq-pg2j · GitHub Advisory Database · CC BY 4.0
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