Buffer overflow in Bytecodealliance Wasmtime
CVE-2021-39218
Wasmtime is an open source runtime for WebAssembly & WASI. In Wasmtime from version 0.26.0 and before version 0.30.0 is affected by a memory unsoundness vulnerability. There was an invalid free and out-of-bounds read and write bug when run…
EPSS: 0.002 (39.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Bytecodealliance Wasmtime — versions >= 0.26.0, <= 0.29.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- crates.io/crates/wasmtime (x_refsource_MISC)
- github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4873-36h9-wv49 (x_refsource_CONFIRM)
- github.com/bytecodealliance/wasmtime/commit/398a73f0dd862dbe703212ebae8e34036a1… (x_refsource_MISC)
- FEDORA-2021-68713440cb (vendor-advisory, x_refsource_FEDORA)
- FEDORA-2021-1805eacb48 (vendor-advisory, x_refsource_FEDORA)
Frequently asked questions
- What is CVE-2021-39218?
- CVE-2021-39218 is a medium-severity vulnerability in Bytecodealliance Wasmtime, classified under CWE-590. CVSS score: 6.3/10. Published 2021-09-17.
- How severe is CVE-2021-39218?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2021-39218 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.