CVE-2021-32810 Data race in crossbeam-deque

What is CVE-2021-32810?

CVE-2021-32810 is a critical vulnerability in Fedoraproject Fedora, published on 2 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

crossbeam-deque is a package of work-stealing deques for building task schedulers when programming in Rust. In versions prior to 0.7.4 and 0.8.0, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue. This has been fixed in crossbeam-deque 0.8.1 and 0.7.4.

Weakness: CWE-362

Which versions are affected by CVE-2021-32810?

5 open source packages ship an affected version, including crossbeam-deque. It affects 2 products.

Products include Crossbeam Project Crossbeam, Fedoraproject Fedora.

How do I fix CVE-2021-32810?

Upgrade crossbeam-deque to a fixed version for your release line: 0.7.4 or 0.8.1.

Is CVE-2021-32810 being exploited?

There is no known exploitation of CVE-2021-32810 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2018-20996 Double free in crossbeam Critical 9.8
• CVE-2022-23639 Improper Restriction of Operations within the Bounds of a Memory Buffer and Race Condition in crossbeam-utils High 8.1
• CVE-2020-15254 Undefined Behavior in bounded Crossbeam channel High 8.1

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-32810, GHSA-pqqp-xmhj-wgcw, RUSTSEC-2021-0093, UBUNTU-CVE-2021-32810.