diff --git a/crates/netmap_sys/RUSTSEC-0000-0000.md b/crates/netmap_sys/RUSTSEC-0000-0000.md
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+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "netmap_sys"
+date = "2026-01-30"
+url = "https://github.com/libpnet/netmap_sys/issues/27"
+informational = "unmaintained"
+
+[versions]
+patched = []
+```
+
+# netmap_sys is unmaintained
+
+netmap_sys will no longer be maintained as the last commit was 5 years ago. The project has an unsoundness issue, which can further lead to a memory safety bug as in [issue #27](https://github.com/libpnet/netmap_sys/issues/27).
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