CVE-2021-29939
HIGHCVSS 7.3/10EPSS 1.03%
Last modified
CVE-2021-29939 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. An issue was discovered in the stackvector crate through 2021-02-19 for Rust. There is an out-of-bounds write in StackVec::extend if size_hint provides certain anomalous data.. EPSS estimates a 1.03% chance of exploitation in the next 30 days.
Description
An issue was discovered in the stackvector crate through 2021-02-19 for Rust. There is an out-of-bounds write in StackVec::extend if size_hint provides certain anomalous data.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Stackvector Project | Stackvector | < 1.0.9 |
References
- https://rustsec.org/advisories/RUSTSEC-2021-0048.htmlExploit, Vendor Advisory
- https://rustsec.org/advisories/RUSTSEC-2021-0048.htmlExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-29939?
An issue was discovered in the stackvector crate through 2021-02-19 for Rust. There is an out-of-bounds write in StackVec::extend if size_hint provides certain anomalous data.
How severe is CVE-2021-29939?
CVE-2021-29939 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.
How do I fix CVE-2021-29939?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-29939?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST