CVE-2020-36433 json
Unaligned memory allocation in chunky
published 2020-08-25 6 y ago modified 2026-06-17 4 mo ago also GHSA-qg24-8xj4-gj2h , RUSTSEC-2020-0035 , EUVD-2021-1842
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
An issue was discovered in the chunky crate through 2020-08-25 for Rust. The Chunk API does not honor an alignment requirement.
Exploit prediction
0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | chunky | <=0.3.7 >=0.0.0-0 |
no fix listed |
Classification
- Weakness
-
- CWE-758 Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
References
-
rustsec.org
/advisories/RUSTSEC-2020-0035.html
web, third-party-advisory, advisory
-
raw.githubusercontent.com
/rustsec/advisory-db/main/crates/chunky/RUSTSEC-2020-0035.md
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-36433
advisory
-
github.com
/aeplay/chunky/issues/2
web, report
-
github.com
/aeplay/chunky
package
-
crates.io
/crates/chunky
package
Sources
- CVE List CVE-2020-36433
- GitHub Advisory GHSA-qg24-8xj4-gj2h
- NVD CVE-2020-36433
- OSV RUSTSEC-2020-0035
Fencer Vulns 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.