Out-of-bounds Read 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…
Vulnerability class: Buffer Overflow
EPSS: 0.003 (22.1th 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
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (Product, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_FEDORA, vendor-advisory)
- security-advisories@github.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-39218?
- CVE-2021-39218 is a medium-severity vulnerability in Bytecodealliance Wasmtime, classified under Out-of-bounds Read. 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.