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+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "columnar"
+date = "2021-01-07"
+url = "https://github.com/frankmcsherry/columnar/issues/6"
+categories = ["memory-exposure"]
+informational = "unsound"
+
+[versions]
+patched = []
+```
+
+# columnar: `Read` on uninitialized buffer may cause UB (ColumnarReadExt::read_typed_vec())
+
+Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation (`ColumnarReadExt::read_typed_vec()`).
+
+Arbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer.
+Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.