发布时间: 2024年5月28日
修改时间: 2024年6月13日
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: fix missing sev_decommission in sev_receive_start DECOMMISSION the current SEV context if binding an ASID fails after RECEIVE_START. Per AMD's SEV API, RECEIVE_START generates a new guest context and thus needs to be paired with DECOMMISSION: The RECEIVE_START command is the only command other than the LAUNCH_START command that generates a new guest context and guest handle. The missing DECOMMISSION can result in subsequent SEV launch failures, as the firmware leaks memory and might not able to allocate more SEV guest contexts in the future. Note, LAUNCH_START suffered the same bug, but was previously fixed by commit 934002cd660b ("KVM: SVM: Call SEV Guest Decommission if ASID binding fails").
| NVD | openEuler | |
|---|---|---|
| Confidentiality | None | |
| Attack Vector | Local | |
| CVSS评分 | N/A | 5.6 |
| Attack Complexity | High | |
| Privileges Required | High | |
| Scope | Unchanged | |
| Integrity | None | |
| User Interaction | None | |
| Availability | None |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-2180 | In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: fix missing sev_decommission in sev_receive_start DECOMMISSION the current SEV context if binding an ASID fails after RECEIVE_START. Per AMD's SEV API, RECEIVE_START generates a new guest context and thus needs to be paired with DECOMMISSION: The RECEIVE_START command is the only command other than the LAUNCH_START command that generates a new guest context and guest handle. The missing DECOMMISSION can result in subsequent SEV launch failures, as the firmware leaks memory and might not able to allocate more SEV guest contexts in the future. Note, LAUNCH_START suffered the same bug, but was previously fixed by commit 934002cd660b ("KVM: SVM: Call SEV Guest Decommission if ASID binding fails"). | 2024年5月28日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-4A | kernel | Unaffected |
| KY3.4-5 | kernel | Unaffected |
| KY3.5.1 | kernel | Unaffected |
| KY3.5.2 | kernel | Unaffected |
| V6 | kernel | Unaffected |
