Vulnerabilities affecting this package (0)
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This package is not known to be affected by vulnerabilities.
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Vulnerabilities fixed by this package (2)
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VCID-7mwd-wjet-eqhd
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Duplicate Advisory: crossbeam-channel Vulnerable to Double Free on Drop
### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-pg9f-39pc-qf8g. This link is maintained to preserve external references.
### Original Description
In crossbeam-channel rust crate, the internal `Channel` type's `Drop` method has a race condition which could, in some circumstances, lead to a double-free that could result in memory corruption.
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GHSA-w443-5h3j-jqcp
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VCID-7vj2-6tfw-3fd4
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crossbeam-channel Vulnerable to Double Free on Drop
The internal `Channel` type's `Drop` method has a race
which could, in some circumstances, lead to a double-free.
This could result in memory corruption.
Quoting from the
[upstream description in merge request \#1187](https://github.com/crossbeam-rs/crossbeam/pull/1187#issue-2980761131):
> The problem lies in the fact that `dicard_all_messages` contained two paths that could lead to `head.block` being read but only one of them would swap the value. This meant that `dicard_all_messages` could end up observing a non-null block pointer (and therefore attempting to free it) without setting `head.block` to null. This would then lead to `Channel::drop` making a second attempt at dropping the same pointer.
The bug was introduced while fixing a memory leak, in
upstream [MR \#1084](https://github.com/crossbeam-rs/crossbeam/pull/1084),
first published in 0.5.12.
The fix is in
upstream [MR \#1187](https://github.com/crossbeam-rs/crossbeam/pull/1187)
and has been published in 0.5.15
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CVE-2025-4574
GHSA-pg9f-39pc-qf8g
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