CVE-2021-47389
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47389
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47389.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47389
- Related
- Published
- 2024-05-21T15:15:24Z
- Modified
- 2024-09-18T01:00:20Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: fix missing sevdecommission in sevreceive_start
DECOMMISSION the current SEV context if binding an ASID fails after RECEIVESTART. Per AMD's SEV API, RECEIVESTART 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").
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source