Bug 2348154 (CVE-2022-49122)

Summary:	CVE-2022-49122 kernel: dm ioctl: prevent potential spectre v1 gadget
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's `dm-ioctl` interface in the `lookup_ioctl()` function, which accepts a user-provided `cmd` value that is used to index the `_ioctls` array directly. This issue could lead to an out-of-bounds access if the CPU speculatively executes the array access before `cmd` is confirmed as valid, allowing an attacker to exploit a Spectre v1 gadget attack.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-02-26 03:19:30 UTC

In the Linux kernel, the following vulnerability has been resolved:

dm ioctl: prevent potential spectre v1 gadget

It appears like cmd could be a Spectre v1 gadget as it's supplied by a
user and used as an array index. Prevent the contents of kernel memory
from being leaked to userspace via speculative execution by using
array_index_nospec.

Comment 1 Avinash Hanwate 2025-02-26 13:53:50 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022604-CVE-2022-49122-b139@gregkh/T

Comment 4 Avinash Hanwate 2025-02-26 18:12:00 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022604-CVE-2022-49122-b139@gregkh/T

Comment 8 errata-xmlrpc 2025-07-01 00:38:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Via RHSA-2025:10005 https://access.redhat.com/errata/RHSA-2025:10005

Comment 9 errata-xmlrpc 2025-07-01 01:03:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2025:10009 https://access.redhat.com/errata/RHSA-2025:10009

Comment 10 errata-xmlrpc 2025-07-02 04:37:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2025:10179 https://access.redhat.com/errata/RHSA-2025:10179

Comment 11 errata-xmlrpc 2025-07-14 00:18:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:10829 https://access.redhat.com/errata/RHSA-2025:10829

Comment 12 errata-xmlrpc 2025-07-14 00:22:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:10830 https://access.redhat.com/errata/RHSA-2025:10830