CVE-2020-35898 json
Use after free in actix-utils
published 2020-01-08 6 y ago modified 2026-06-17 4 mo ago also GHSA-hhw2-pqhf-vmx2 , RUSTSEC-2020-0045 , EUVD-2021-1747
- cvss
- 9.1
- 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 73%
- public exploits
- 0
- none known
Summary
An issue was discovered in the actix-utils crate before 2.0.0 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.
Patch / fix
- crates.io actix-utils 2.0.0
- actix actix-utils 2.0.0
Exploit prediction
1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- rustsec.org https://rustsec.org/advisories/RUSTSEC-2020-0045.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| OSV | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | actix-utils | <2.0.0 >=0.0.0-0, <2.0.0 |
2.0.0 |
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
rustsec.org
/advisories/RUSTSEC-2020-0045.html
web, exploit, patch, third-party-advisory, advisory
-
github.com
/actix/actix-net/commit/0dca1a705ad1ff4885b3491ecb809a808e1de66c
web
-
nvd.nist.gov
/vuln/detail/CVE-2020-35898
advisory
-
github.com
/actix/actix-net/issues/160
web, report
-
github.com
/actix/actix-net
package
-
crates.io
/crates/actix-utils
package
Sources
- CVE List CVE-2020-35898
- GitHub Advisory GHSA-hhw2-pqhf-vmx2
- NVD CVE-2020-35898
- OSV RUSTSEC-2020-0045
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.