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CVE-2022-49610

KVM: VMX: Prevent RSB underflow before vmenter

Published: Feb 26, 2025Updated: Oct 23, 2025 Sources: CVE List NVD BDUNVD-CWE-noinfo
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.2%
Top 89.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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. ]

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

LinuxLinux
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Red Hat VirtualizationRed Hat Inc.
On-prem
Cloud & SaaS / virtualization
LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
linuxoss-projectOperating Systemsaka the linux kernel
red hat inc.commercialUSOperating Systemsaka red hat
canonical ltd.commercialGBOperating Systemsaka canonical
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, 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 →

Timeline

Published
Feb 26, 2025
Last Updated
Oct 23, 2025

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