CVE-2021-32810

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability80. percentile1.9%

Product

Crossbeam

PublishedAug 2, 2021

First seenAug 2, 2021

Weakness typeCWE-362Race condition

How to fix

Update

crossbeam_project crossbeam0.7.4, 0.8.1 or later

Vendor advisories

Affected products

Product	Affected versions	Fixed in
crossbeam_project crossbeam	v < 0.7.4, 0.8.0 ≤ v < 0.8.1	0.7.4, 0.8.1
fedoraproject fedora	34	—

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