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Add lockfree unsound & unmaintained #2461

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Add lockfree unsound & unmaintained #2461

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3 changes: 3 additions & 0 deletions EXAMPLE_ADVISORY.md
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Expand Up @@ -6,8 +6,11 @@ date = "2020-01-31"
url = "https://example.com"
# Valid categories: "code-execution", "crypto-failure", "denial-of-service", "file-disclosure"
# "format-injection", "memory-corruption", "memory-exposure", "privilege-escalation"
# They are described at https://github.com/rustsec/rustsec/blob/main/rustsec/src/advisory/category.rs
categories = ["code-execution", "privilege-escalation"]
keywords = ["example", "freeform", "keywords"]
# Valid informational: notice, unmaintained, unsound
informational = "unsound"
#aliases = ["CVE-YYYY-NNNN"]
#cvss = "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"

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25 changes: 25 additions & 0 deletions crates/lockfree/RUSTSEC-0000-0000.md
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@@ -0,0 +1,25 @@
```toml
[advisory]
id = "RUSTSEC-0000-0000"
package = "lockfree"
date = "2025-11-17"
url = "https://gitlab.com/bzim/lockfree/-/issues/4"
categories = ["memory-corruption"]
keywords = ["memory-safety", "std::mem::uninitialized"]
informational = "unsound"

[versions]
patched = []
unaffected = ["<= 0.4.0"]
```

# lockfree crate is unsound and unmaintained

Affected versions of this crate called `mem::uninitialized()` to construct `Removable<T>`.
This is unsound.

In addition, the `lockfree` crate is no longer actively maintained. If you rely on this crate, consider switching to a recommended alternative.

## Recommended alternatives

- [`lock_freedom`](https://crates.io/crates/lock_freedom)
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@djc djc Nov 18, 2025

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I don't think this is active/trustworthy enough to merit a recommendation.

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@jayvdb jayvdb Nov 18, 2025

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so should I look for others, or just not recommend any?

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@djc djc Nov 18, 2025

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Just don't recommend any -- users can look for themselves.

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@jayvdb jayvdb Nov 19, 2025 •
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Maintainer of lock_freedom is giving it a bit of love.

Also I have found https://github.com/DiscordJim/lfqueue and https://github.com/emilHof/sling and https://github.com/emilHof/unlink as other narrower alternatives that users may find useful if they dont need the full suite of features of lockfree.

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@djc djc Nov 20, 2025

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None of these are in widespread usage or by maintainers that have other popular crates.