CVE-2020-35902: actix actix-codec Use After Free
Modified
AliasesGHSA-rqgx-hpg4-456rRUSTSEC-2020-0049
Published 31-12-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-35902 is a critical (CVSS 9.8) Use After Free vulnerability in actix actix-codec. EPSS estimates a 1.65% chance of exploitation in the next 30 days, higher than 76.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.65%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference
Timeline
- 31-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the actix-codec crate before 0.3.0-beta.1 for Rust. There is a use-after-free in Framed.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- OSV · Crates.ioEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.65%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 1.63% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (rustsec.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Actix1 product
- actix-codec≤ 0.2.0
Crates.Io1 product
- actix-codec< 0.3.0 | ≥ 0.0.0-0, < 0.3.0-beta.1
2 vendors · 2 products
References
6 links
- github.com/actix/actix-netPACKAGE
- crates.io/crates/actix-codecPACKAGE