CVE-2025-8734
CSIRTS triage
- What
- Double free vulnerability in scan-code.c code_free function.
- Who is affected
- Systems using GNU Bison to process grammar files with vulnerable Bison versions.
- Urgency
- Low severity (CVSS 3.3) and not exploited; limited practical impact in typical usage.
- Action
- Update to patched Bison version that removes the double free in code_free.
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Advisory coverage (1)
- lowCVE-2025-8734: GNU Bison scan-code.c code_free double freemsrc · 2026-08-06
External references
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[](https://www.csirts.com/cve/CVE-2025-8734)