re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.
Priority LOW 28CWE-674Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-674.
Summary
re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.
Why it matters now
EPSS 0.01468 73rd 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
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2018-21232
- 2026-10-03 Alias added: GHSA-pgr8-gpgg-9j5m
References
More Re2c vulnerabilities
- TI-2022-07883 A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc. CVSS 3.1CRITICAL 9.8
- TI-2020-09620 re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme. CVSS 3.1HIGH 7.8
Sources
- CVE-2018-21232 · CVE Program
- CVE-2018-21232 · NVD
- FIRST EPSS
- GHSA-pgr8-gpgg-9j5m · GitHub Advisory Database · CC BY 4.0
- CVE-2018-21232 · Red Hat security data · CC BY 4.0
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