{"id":"RUSTSEC-2026-0291","summary":"Double free in `OwnedAlloc::drop_in_place` when the contained value's `Drop` panics","details":"`OwnedAlloc::drop_in_place` destroys the contained value by hand, then commits\nthe ownership transfer with `mem::forget(self)` — which lives inside `into_raw`\nand so runs only after the destruction. `T::drop` is user code and may panic. If\nit does, the forget is skipped and the still-live `OwnedAlloc` unwinds, whose\ndestructor drops the same `T` a second time and then deallocates. For a `T` that\nowns an allocation, the same block is freed twice — a double free (CWE-415).\nThat destructor also reads the already-destroyed value through\n`Layout::for_value` before deallocating, a use-after-free (CWE-416).\n\n`MaybeUninitAlloc::drop_in_place` delegates to the same function, so both public\nentry points are affected. Storing a value whose `Drop` can panic and calling\neither is enough — no `unsafe` on the caller's side.\n\n## Fix\n\nNo fixed release is available. The crate has had no release since 2018 and the\nmaintainer has not responded to the report, nor to the one on `lockfree`, which\nis published from the same account. `forget_inner` leaks the value instead of\ndestroying it, which is safe.","modified":"2026-09-21T09:15:02.893165285Z","published":"2026-09-09T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/owned-alloc"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2026-0291.html"},{"type":"REPORT","url":"https://gitlab.com/bzim/owned-alloc/-/issues/1"}],"affected":[{"package":{"name":"owned-alloc","ecosystem":"crates.io","purl":"pkg:cargo/owned-alloc"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"}]}],"ecosystem_specific":{"affects":{"os":[],"functions":["owned_alloc::MaybeUninitAlloc::drop_in_place","owned_alloc::OwnedAlloc::drop_in_place"],"arch":[]},"affected_functions":null},"database_specific":{"cvss":null,"informational":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0291.json","categories":["memory-corruption"]}}],"schema_version":"1.9.0"}