CVE-2023-0045
Public on 2023-02-06
Modified on 2024-04-23
Description
The Linux kernel does not correctly mitigate SMT attacks, as discovered through a strange pattern in the kernel API using STIBP as a mitigation, leaving the process exposed for a short period of time after a syscall. The kernel also does not issue an IBPB immediately during the syscall.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2023-03-17 | ALAS-2023-1706 | Fixed |
| Amazon Linux 2 - Core | kernel | 2023-02-03 | ALAS2-2023-1932 | Fixed |
| Amazon Linux 2 - Kernel-5.10 Extra | kernel | 2023-01-31 | ALAS2KERNEL-5.10-2023-026 | Fixed |
| Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2023-01-31 | ALAS2KERNEL-5.15-2023-013 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2023-02-17 | ALAS2KERNEL-5.4-2023-042 | Fixed |
| Amazon Linux 2023 | kernel | Pending Fix |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.3 | AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVD | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |