CVE-2026-115889: Wasmtime: Bit-packing in Cranelift compiler causes silent overflow and miscompilation
Overview
- Severity
- Critical (CVSS 9.9)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H/E:U
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Oct
- Released
- 2026-10-29
- EPSS Score
- 0.45% (percentile: 39.3%)
Detection & Weaponization (1 sources)
Maturity: Exploit
- GitHub PoC: 1 repositories
Affected Products (2)
Open Source Software
- azl3 rust 1.75.0-31 on Azure Linux 3.0
- azl3 rust 1.96.1-2 on Azure Linux 3.0
Revision History
- 2026-10-29: Information published.