wasm3 m3_compile.c MarkSlotAllocated out-of-bounds write
Priority MEDIUM 55CWE-119Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
A vulnerability has been found in wasm3 0.5.0 and classified as problematic. This vulnerability affects the function MarkSlotAllocated of the file source/m3_compile.c. The manipulation leads to out-of-bounds write. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00236 14th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | wasm3 | 0.5.0 | — | No fix listed | CNA |
| — | pywasm3 (PyPI) | up to 0.5.0 | — | No fix listed | GHSA-rrmw-gv85-w824 |
- wasm3 Vendor— Affected 0.5.0 Fixed in — No fix listed CNA
- pywasm3 (PyPI) Vendor— Affected up to 0.5.0 Fixed in — No fix listed GHSA-rrmw-gv85-w824
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wasm3_project:wasm3:0.5.0:*:*:*:*:*:*:* | 0.5.0 | Vulnerable | Wasm3 Project |
- cpe:2.3:a:wasm3_project:wasm3:0.5.0:*:*:*:*:*:*:* Versions 0.5.0 Vulnerable ·Wasm3 Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-6272
- 2026-10-03 Alias added: GHSA-rrmw-gv85-w824
References
Exploit 2
More Wasm3 Project Wasm3 vulnerabilities
- TI-2024-22659 wasm3 v0.5.0 was discovered to contain a global buffer overflow which leads to… CVSS 3.1HIGH 7.5
- TI-2024-18299 wasm3 139076a contains a Use-After-Free in ForEachModule. CVSS 3.1HIGH 8.4
- TI-2024-18298 wasm3 139076a contains memory leaks in Read_utf8. CVSS 3.1HIGH 8.4
- TI-2024-18297 wasm3 139076a suffers from Invalid Memory Read, leading to DoS and potential Code Execution. CVSS 3.1HIGH 8.4
- TI-2024-18296 wasm3 139076a is vulnerable to Denial of Service (DoS). CVSS 3.1HIGH 7.5
- TI-2022-18927 WASM3 v0.5.0 was discovered to contain a segmentation fault via the component… CVSS 3.1HIGH 7.5
Sources
- CVE-2025-6272 · CVE Program
- CVE-2025-6272 · NVD
- FIRST EPSS
- GHSA-rrmw-gv85-w824 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences