Bug 2360239 (CVE-2023-53034)

Summary:	CVE-2023-53034 kernel: Linux kernel: Information disclosure and denial of service in ntb_hw_switchtec module
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:	---
Doc Text:	A flaw was found in the Linux kernel. A local user could exploit a shift-out-of-bounds vulnerability within the `ntb_hw_switchtec` module. This vulnerability arises when the `ntb_mw_clear_trans()` application programming interface (API) processes zero values for address and size, leading to an invalid memory access. Successful exploitation could result in information disclosure and denial of service.	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 2025-04-16 15:04:07 UTC

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

ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans

There is a kernel API ntb_mw_clear_trans() would pass 0 to both addr and
size. This would make xlate_pos negative.

[   23.734156] switchtec switchtec0: MW 0: part 0 addr 0x0000000000000000 size 0x0000000000000000
[   23.734158] ================================================================================
[   23.734172] UBSAN: shift-out-of-bounds in drivers/ntb/hw/mscc/ntb_hw_switchtec.c:293:7
[   23.734418] shift exponent -1 is negative

Ensuring xlate_pos is a positive or zero before BIT.

Comment 1 Avinash Hanwate 2025-04-17 11:29:49 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041650-CVE-2023-53034-8c3b@gregkh/T

Comment 4 errata-xmlrpc 2026-01-26 14:09:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:1194 https://access.redhat.com/errata/RHSA-2026:1194

Comment 5 errata-xmlrpc 2026-01-28 00:22:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:1443 https://access.redhat.com/errata/RHSA-2026:1443

Comment 6 errata-xmlrpc 2026-01-28 00:29:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:1441 https://access.redhat.com/errata/RHSA-2026:1441

Comment 7 errata-xmlrpc 2026-01-28 00:36:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:1444 https://access.redhat.com/errata/RHSA-2026:1444

Comment 8 errata-xmlrpc 2026-01-28 15:04:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:1495 https://access.redhat.com/errata/RHSA-2026:1495

Comment 9 errata-xmlrpc 2026-01-28 15:08:00 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:1494 https://access.redhat.com/errata/RHSA-2026:1494

Comment 11 errata-xmlrpc 2026-02-02 15:25:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:1727 https://access.redhat.com/errata/RHSA-2026:1727

Comment 12 errata-xmlrpc 2026-02-16 11:53:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:2721 https://access.redhat.com/errata/RHSA-2026:2721

Comment 13 errata-xmlrpc 2026-02-16 12:02:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:2722 https://access.redhat.com/errata/RHSA-2026:2722