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CVE-2021-32810

Published: 2 August 2021

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.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
trusty Does not exist

impish
Released (93.0+build1-0ubuntu2)
bionic
Released (93.0+build1-0ubuntu0.18.04.1)
focal
Released (93.0+build1-0ubuntu0.20.04.1)
hirsute
Released (93.0+build1-0ubuntu0.21.04.1)
upstream Needs triage

jammy
Released (93.0+build1-0ubuntu2)
kinetic
Released (93.0+build1-0ubuntu2)
lunar
Released (93.0+build1-0ubuntu2)
xenial Ignored
(end of standard support)
rust-crossbeam-deque
Launchpad, Ubuntu, Debian
lunar Not vulnerable
(0.8.1-1)
trusty Does not exist

xenial Ignored
(end of standard support)
bionic Does not exist

focal Needs triage

upstream
Released (0.7.4-1)
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
jammy Needs triage

impish Ignored
(end of life)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H