CVE-2021-32810: Data race in crossbeam-deque
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::stealbatch, or Stealer::stealbatchandpop are affected by this issue. This has been fixed in crossbeam-deque 0.8.1 and 0.7.4.
Other sources
In the crossbeam crate, one or more tasks in the worker queue could have been be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this could have caused a double free and a memory leak.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 91.2 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 93 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 91.2 - Upgrade
Upgrade
alpine/firefoxto a version that resolves this vulnerability.Fixed in 93.0-r0 - Upgrade
Upgrade
alpine/firefox-esrto a version that resolves this vulnerability.Fixed in 91.2.0-r0 - Upgrade
Upgrade
alpine/librewolfto a version that resolves this vulnerability.Fixed in 93.0-r0 - Upgrade
Upgrade
alpine/thunderbirdto a version that resolves this vulnerability.Fixed in 91.3.2-r0 - Upgrade
Upgrade
crossbeam-dequeto a version that resolves this vulnerability.Fixed in 0.8.1
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is CVE-2021-32810?
CVE-2021-32810 is a vulnerability in the crossbeam crate that can result in one or more tasks in the worker queue being popped twice.
Which software products are affected by CVE-2021-32810?
Mozilla Thunderbird, Mozilla Firefox, Mozilla Firefox ESR, Crossbeam Project Crossbeam, and Fedora 34 are affected by CVE-2021-32810.
What is the severity of CVE-2021-32810?
CVE-2021-32810 has a severity rating of 9.8 (Critical).
How can I fix CVE-2021-32810?
To fix CVE-2021-32810, update to the latest version of the affected software products or apply the recommended patches.
Where can I find more information about CVE-2021-32810?
More information about CVE-2021-32810 can be found on the following references: [Link 1](https://bugzilla.mozilla.org/show_bug.cgi?id=1729813), [Link 2](https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-pqqp-xmhj-wgcw), [Link 3](https://www.mozilla.org/en-US/security/advisories/mfsa2021-47/).