CVE-2022-49610
KVM: VMX: Prevent RSB underflow before vmenter
Summary
KVM: VMX: Prevent RSB underflow before vmenter
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
KVM: VMX: Prevent RSB underflow before vmenter
On VMX, there are some balanced returns between the time the guest's
SPEC_CTRL value is written, and the vmenter.
Balanced returns (matched by a preceding call) are usually ok, but it's
at least theoretically possible an NMI with a deep call stack could
empty the RSB before one of the returns.
For maximum paranoia, don't allow any returns (balanced or otherwise)
between the SPEC_CTRL write and the vmenter.
[ bp: Fix 32-bit build. ]
Affected packages
Linux
Kernel
[{"type":"ECOSYSTEM","events":[{"introduced":"4.16.0"},{"fixed":"5.18.14"}]}]
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2022-49610 linux
- Ubuntu UBUNTU-CVE-2022-49610 linux
References
- advisory github.com
- advisory nvd.nist.gov
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org