CVE-2021-29939
CVE-2021-29939 is a high-severity vulnerability in Stackvector Project Stackvector with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.3)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (59th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Stackvector Project Stackvector
- Published:
- Last modified:
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.
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 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2021-29939 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-29939?
- CVE-2021-29939 affects Stackvector Project Stackvector. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-29939?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-29939 published?
- CVE-2021-29939 was published on 2021-04-01 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:stackvector_project:stackvector:*:*:*:*:*:rust:*:*
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