CVE-2025-8733

lowCVSS 3.3covered by 1 sourcefirst seen 2026-08-06

CSIRTS triage

What: GNU Bison obprintf.c __obstack_vprintf_internal function has an assertion that can be triggered causing a crash.
Who is affected: Systems using GNU Bison parser generator with malformed input or specific code generation scenarios.
Urgency: Low priority; denial of service limited to Bison processing with CVSS 3.3 and not actively exploited.
Action: Upgrade GNU Bison to a patched version that fixes CVE-2025-8733.

AI-assisted analysis generated from the source advisory — verify against the original.

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