rust-lang/futures-rs · Security
futures_task::noop_waker_ref can segfault due to dereferencing a NULL pointer
- GHSA ID
- GHSA-p9m5-3hj7-cp5r
- CVE ID
- CVE-2020-35907
- Severity
- medium
- Published
- Updated
- CVSS
- 5.5 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 5.5 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Description
Affected versions of the crate used a UnsafeCell in thread-local storage to return a noop waker reference, assuming that the reference would never be returned from another thread.
This resulted in a segmentation fault crash if Waker::wake_by_ref() was called on a waker returned from another thread due to it attempting to dereference a pointer that wasn't accessible from the main thread.
CWEs
- CWE-476 · NULL Pointer Dereference