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CVE-2022-49611

x86/speculation: Fill RSB on vmexit for IBRS

Published: Feb 26, 2025Updated: Oct 23, 2025 Sources: CVE List NVD BDUNVD-CWE-noinfo
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.3%
Top 81.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

In the Linux kernel, the following vulnerability has been resolved: x86/speculation: Fill RSB on vmexit for IBRS Prevent RSB underflow/poisoning attacks with RSB. While at it, add a bunch of comments to attempt to document the current state of tribal knowledge about RSB attacks and what exactly is being mitigated.

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
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Red Hat VirtualizationRed Hat Inc.
On-prem
Cloud & SaaS / virtualization
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
linuxoss-projectOperating Systemsaka the linux kernel
canonical ltd.commercialGBOperating Systemsaka canonical
red hat inc.commercialUSOperating Systemsaka red hat
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 2 more affected products View all →

Exploitability

Official Patch Available

References

https://git.kernel.org/stable/c/3d323b99ff5c8c57005184056d65f6af5b0479d8
git.kernel.org
https://git.kernel.org/stable/c/f744b88dfc201bf8092833ec70b23c720188b527
git.kernel.org
https://git.kernel.org/stable/c/17a9fc4a7b91f8599223631bb6ae6416bc0de1c0
git.kernel.org
and 22 more references View all →

Timeline

Published
Feb 26, 2025
Last Updated
Oct 23, 2025

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