Vulnerability · Published Jun 19, 2025 · Assigned by VulDB
CVE-2025-6272wasm3 m3_compile.c MarkSlotAllocated out-of-bounds write
Low 3.3
In plain English
A low-severity out-of-bounds write in wasm3. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.2%top 85.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | pywasm3 | no fix listed | GHSA-rrmw-gv85-w824 |
| PyPI | pywasm3 | no fix listed | PYSEC-2025-186 |
Affected products (as reported)
Weakness: CWE-787, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
References
- VDB-313276 | wasm3 m3_compile.c MarkSlotAllocated out-of-bounds write vdb-entry, technical-description
- VDB-313276 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #593008 | wasm3 wasm3 v0.5.0 (commit 79d412e) Out-of-bounds Write third-party-advisory
- https://github.com/wasm3/wasm3/issues/531 issue-tracking
- https://github.com/user-attachments/files/19516600/wasm3_crash.txt exploit