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advisory-db/crates/futures-task/RUSTSEC-2020-0060.md
2020-10-31 13:12:22 +00:00

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```toml
[advisory]
id = "RUSTSEC-2020-0060"
package = "futures-task"
date = "2020-09-04"
url = "https://github.com/rust-lang/futures-rs/pull/2206"
categories = ["code-execution", "memory-corruption"]
keywords = ["use-after-free", "arbitrary code execution", "memory-corruption", "memory-management"]
[versions]
patched = [">= 0.3.6"]
unaffected = ["<= 0.2.1"]
[affected]
functions = { "futures_task::waker" = [">= 0.3.0"] }
```
# futures_task::waker may cause a use-after-free if used on a type that isn't 'static
Affected versions of the crate did not properly implement a `'static` lifetime bound on the `waker` function.
This resulted in a use-after-free if `Waker::wake()` is called after original data had been dropped.
The flaw was corrected by adding `'static` lifetime bound to the data `waker` takes.