CVE-2018-20996 json
Double free in crossbeam
published 7y ago modified 3mo ago also GHSA-c3cw-c387-pj65 , RUSTSEC-2018-0009 , EUVD-2021-1671
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
An issue was discovered in the crossbeam crate before 0.4.1 for Rust. There is a double free because of destructor mishandling.
Patch / fix
- crates.io crossbeam 0.4.1
- crossbeam_project crossbeam 0.4.1
Is CVE-2018-20996 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.74% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | crossbeam | >=0.4.0, <0.4.1 |
0.4.1 |
Classification
- Weakness
-
- CWE-415 Double Free
References
-
rustsec.org
/advisories/RUSTSEC-2018-0009.html
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-20996
advisory
-
github.com
/crossbeam-rs/crossbeam-epoch/issues/82
web, report
-
github.com
/crossbeam-rs/crossbeam-epoch
package
-
crates.io
/crates/crossbeam
package
Sources
- CVE List CVE-2018-20996
- GitHub Advisory GHSA-c3cw-c387-pj65
- NVD CVE-2018-20996
- OSV RUSTSEC-2018-0009
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.