CVE-2022-49610
KVM: VMX: Prevent RSB underflow before vmenter
Description
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. ]
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:LPrivileges RequiredLow
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
Red Hat Inc.
commercial·USaka red hat
Linux
oss-projectaka the linux kernel
Canonical Ltd.
commercial·GBaka canonical
Сообщество свободного программного обеспечения
oss-projectaka fsf
and 1 more affected products View all →
Exploitability
Official Patch Available
References
https://git.kernel.org/stable/c/afd743f6dde87296c6f3414706964c491bb85862
git.kernel.org
https://git.kernel.org/stable/c/07853adc29a058c5fd143c14e5ac528448a72ed9
git.kernel.org
https://git.kernel.org/stable/c/afd743f6dde87296c6f3414706964c491bb85862
git.kernel.org
and 6 more references View all →
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