CVE-2018-5407: Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.
Overview
- Severity
- Medium (CVSS 4.7)
- CVSS Vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Aug
- Released
- 2026-04-29
- Last Updated
- 2026-08-07
- EPSS Score
- 3.42% (percentile: 87.8%)
Affected Products (8)
Open Source Software
- cbl2 shim-unsigned-aarch64 15-5 on CBL Mariner 2.0
- azl3 shim-unsigned-x64 16.1-1 on Azure Linux 3.0
- azl3 shim-unsigned-aarch64 16.1-2 on Azure Linux 3.0
- azl3 shim-unsigned-x64 16.1-2 on Azure Linux 3.0
- cbl2 shim-unsigned-aarch64 15-5
- cbl2 shim-unsigned-x64 15.8-1
- cbl2 shim-unsigned-x64 15.8-1 on CBL Mariner 2.0
- azl3 shim-unsigned-aarch64 16.1-1 on Azure Linux 3.0
Revision History
- 2026-04-29: Information published.
- 2026-04-29: Information published.
- 2026-08-07: Information published.