A logic bug flaw was found in the Linux kernel's implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | kernel | 2020-07-14 21:14 | ALAS-2020-1401 |
Amazon Linux 2 - Core | kernel | 2020-07-21 16:34 | ALAS2-2020-1465 |
Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-20 19:22 | ALAS2KERNEL-5.4-2022-013 |
Amazon Linux 2 - Livepatch Extra | kernel-livepatch-4.14.181-142.260 | 2020-09-04 17:55 | ALAS2LIVEPATCH-2020-025 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
NVD | CVSSv2 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
NVD | CVSSv3 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |