CVE-2021-29940 json
Double free in through
published 2021-02-18 5 y ago modified 2026-06-17 4 mo ago also GHSA-5hpj-m323-cphm , RUSTSEC-2021-0049 , EUVD-2021-1576
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
An issue was discovered in the through crate through 2021-02-18 for Rust. There is a double free (in through and through_and) upon a panic of the map function.
Exploit prediction
1.37% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- rustsec.org https://rustsec.org/advisories/RUSTSEC-2021-0049.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/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 |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/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 | through | <=0.1.0 >=0.0.0-0 |
no fix listed |
Classification
- Weakness
-
- CWE-415 Double Free
References
-
rustsec.org
/advisories/RUSTSEC-2021-0049.html
web, exploit, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-29940
advisory
-
github.com
/gretchenfrage/through/issues/1
web, report
-
github.com
/gretchenfrage/through
package
-
crates.io
/crates/through
package
Sources
- CVE List CVE-2021-29940
- GitHub Advisory GHSA-5hpj-m323-cphm
- NVD CVE-2021-29940
- OSV RUSTSEC-2021-0049
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