CVE-2021-45947
CVE-2021-45947 is a medium-severity vulnerability in Wasm3 Project Wasm3 with a CVSS 3.x base score of 5.5. 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: Medium (CVSS 3.x base score 5.5)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Wasm3 Project Wasm3
- Published:
- Last modified:
Description
Wasm3 0.5.0 has an out-of-bounds write in Runtime_Release (called from EvaluateExpression and InitDataSegments).
Frequently asked questions
- What is CVE-2021-45947?
- Wasm3 0.5.0 has an out-of-bounds write in Runtime_Release (called from EvaluateExpression and InitDataSegments).
- How severe is CVE-2021-45947?
- CVE-2021-45947 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-45947 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-45947?
- CVE-2021-45947 affects Wasm3 Project Wasm3. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-45947?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-45947 published?
- CVE-2021-45947 was published on 2022-01-01 and last updated on 2026-06-17.
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33689
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wasm3/OSV-2021-689.yaml
Affected products (1)
- cpe:2.3:a:wasm3_project:wasm3:0.5.0:*:*:*:*:*:*:*
More vulnerabilities in Wasm3 Project Wasm3
- CVE-2024-34249 — Critical (CVSS 9.8): wasm3 v0.5.0 was discovered to contain a heap buffer overflow which leads to segmentation fault via the function…
- CVE-2024-27530 — High (CVSS 8.4): wasm3 139076a contains a Use-After-Free in ForEachModule.
- CVE-2024-27529 — High (CVSS 8.4): wasm3 139076a contains memory leaks in Read_utf8.
- CVE-2024-27528 — High (CVSS 8.4): wasm3 139076a suffers from Invalid Memory Read, leading to DoS and potential Code Execution.
- CVE-2022-28990 — High (CVSS 7.8): WASM3 v0.5.0 was discovered to contain a heap overflow via the component /wabt/bin/poc.wasm.
- CVE-2024-27527 — High (CVSS 7.5): wasm3 139076a is vulnerable to Denial of Service (DoS).
All CVEs affecting Wasm3 Project Wasm3 →
Other CWE-787 (Out-of-bounds Write) vulnerabilities
- CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
- CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src modules). This vulnerability is…
- CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
- CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
- CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
- CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…