CVE-2021-38191

mediumpriority · track · 24EPSS 0.008 · 58 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.83% (58th) EPSS
CVSS 4.3 · medium
Is it mine?
9 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-28

An issue was discovered in the tokio crate before 1.8.1 for Rust. Upon a JoinHandle::abort, a Task may be dropped in the wrong thread.

01

cvss

Technical severity, 0–10. One row per scoring source.

5.9
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 3.6
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV
v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USprimaryCWE-362USCWE-366US
03

affected products (9)

Products and version ranges known to be affected.

04

advisories (2)

Vendor and ecosystem advisories describing this.

  • GHSA-2grh-hm3w-w7hvRace condition in tokio2021-08-25ghsa · osvUS

    When aborting a task with JoinHandle::abort, the future is dropped in the thread calling abort if the task is not currently being executed. This is incorrect for tasks spawned on a LocalSet. This can easily result in race conditions as many projects use Rc or RefCell in their Tokio tasks for better performance.

  • RUSTSEC-2021-0072Task dropped in wrong thread when aborting `LocalSet` task2021-07-07vendor · osvUS

    When aborting a task with `JoinHandle::abort`, the future is dropped in the thread calling abort if the task is not currently being executed. This is incorrect for tasks spawned on a `LocalSet`. This can easily result in race conditions as many projects use `Rc` or `RefCell` in their Tokio tasks for better performance. See [tokio#3929][issue] for more details. [issue]: https://github.com/tokio-rs/tokio/issues/3929

05

also known as (5)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdosvnvdNVDCVE.orgMITRE
published 2021-08-08modified 2026-06-17
08

references (7)

External citations — patches, advisories, analysis.

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