CVE-2021-47389

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").

The following products are affected by CVE-2021-47389 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2021-47389.

URL	Resource
https://git.kernel.org/stable/c/efd7866e114dcb44f86d151e843f8276b7efbc67
https://git.kernel.org/stable/c/f1815e0aa770f2127c5df31eb5c2f0e37b60fa77
https://lore.kernel.org/linux-cve-announce/2024052145-CVE-2021-47389-c01c@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47389
https://www.cve.org/CVERecord?id=CVE-2021-47389