| Title | dvidelabs flatcc v0.6.3 Memory Leak |
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| Description | define_fb_name() inserts reserved keywords into a dedicated keyword_index hash table (src/compiler/semantics.c:260). The parser's teardown (fb_clear_parser) frees the attribute_index and include_index tables but omits keyword_index, so every schema parse leaks the keyword table (~1024 bytes). For any persistent process (fuzz harness, daemon, IDE language server) that parses schemas repeatedly, memory grows without bound.
Affected versions: flatcc HEAD v0.6.3
Severity: Medium (deterministic per-parse memory leak; DoS by resource exhaustion in persistent processes)
CWE: CWE-401 (Improper Release of Memory Before Removing Last Reference) |
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| Source | ⚠️ https://github.com/dvidelabs/flatcc/issues/389 |
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| User | lrrh (UID 100159) |
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| Submission | 08/08/2026 10:37 (1 month ago) |
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| Moderation | 09/13/2026 15:01 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 403290 [Dvidelabs flatcc up to 0.6.3 src/Compiler/semantics.c fb_clear_parser memory leak] |
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| Points | 20 |
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