Bug 2467015 (CVE-2026-43112) - CVE-2026-43112 kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
Summary: CVE-2026-43112 kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize...
Keywords:
Status: NEW
Alias: CVE-2026-43112
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-06 10:03 UTC by OSIDB Bzimport
Modified: 2026-09-03 12:01 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:34911 0 None None None 2026-07-02 13:42:30 UTC
Red Hat Product Errata RHSA-2026:36018 0 None None None 2026-07-06 19:57:14 UTC
Red Hat Product Errata RHSA-2026:36365 0 None None None 2026-07-07 21:16:06 UTC
Red Hat Product Errata RHSA-2026:36366 0 None None None 2026-07-07 21:33:56 UTC
Red Hat Product Errata RHSA-2026:40764 0 None None None 2026-07-21 15:13:27 UTC
Red Hat Product Errata RHSA-2026:52649 0 None None None 2026-08-10 05:35:26 UTC
Red Hat Product Errata RHSA-2026:52764 0 None None None 2026-08-10 10:11:49 UTC
Red Hat Product Errata RHSA-2026:53989 0 None None None 2026-08-12 00:41:28 UTC
Red Hat Product Errata RHSA-2026:53990 0 None None None 2026-08-12 00:57:59 UTC
Red Hat Product Errata RHSA-2026:56573 0 None None None 2026-08-19 00:59:44 UTC
Red Hat Product Errata RHSA-2026:57402 0 None None None 2026-08-26 16:32:56 UTC
Red Hat Product Errata RHSA-2026:57457 0 None None None 2026-08-25 13:52:13 UTC
Red Hat Product Errata RHSA-2026:57543 0 None None None 2026-08-25 13:54:33 UTC
Red Hat Product Errata RHSA-2026:59662 0 None None None 2026-08-26 00:44:36 UTC
Red Hat Product Errata RHSA-2026:59663 0 None None None 2026-08-26 00:18:08 UTC
Red Hat Product Errata RHSA-2026:59831 0 None None None 2026-09-03 12:01:35 UTC
Red Hat Product Errata RHSA-2026:60019 0 None None None 2026-09-03 08:58:53 UTC
Red Hat Product Errata RHSA-2026:62558 0 None None None 2026-09-02 09:56:09 UTC
Red Hat Product Errata RHSA-2026:62637 0 None None None 2026-09-02 14:10:20 UTC
Red Hat Product Errata RHSA-2026:62638 0 None None None 2026-09-02 13:53:10 UTC
Red Hat Product Errata RHSA-2026:62639 0 None None None 2026-09-02 14:00:11 UTC
Red Hat Product Errata RHSA-2026:62640 0 None None None 2026-09-02 14:07:38 UTC
Red Hat Product Errata RHSA-2026:62641 0 None None None 2026-09-02 14:11:40 UTC
Red Hat Product Errata RHSA-2026:62642 0 None None None 2026-09-02 14:03:26 UTC

Description OSIDB Bzimport 2026-05-06 10:03:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath

When cifs_sanitize_prepath is called with an empty string or a string
containing only delimiters (e.g., "/"), the current logic attempts to
check *(cursor2 - 1) before cursor2 has advanced. This results in an
out-of-bounds read.

This patch adds an early exit check after stripping prepended
delimiters. If no path content remains, the function returns NULL.

The bug was identified via manual audit and verified using a
standalone test case compiled with AddressSanitizer, which
triggered a SEGV on affected inputs.
Comment 1 Alexander B 2026-05-06 13:45:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050625-CVE-2026-43112-f37f@gregkh/T
Comment 6 errata-xmlrpc 2026-07-02 13:42:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:34911 https://access.redhat.com/errata/RHSA-2026:34911
Comment 7 errata-xmlrpc 2026-07-06 19:57:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:36018 https://access.redhat.com/errata/RHSA-2026:36018
Comment 8 errata-xmlrpc 2026-07-07 21:16:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:36365 https://access.redhat.com/errata/RHSA-2026:36365
Comment 9 errata-xmlrpc 2026-07-07 21:33:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:36366 https://access.redhat.com/errata/RHSA-2026:36366
Comment 10 errata-xmlrpc 2026-07-21 15:13:26 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:40764 https://access.redhat.com/errata/RHSA-2026:40764
Comment 11 errata-xmlrpc 2026-08-10 05:35:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:52649 https://access.redhat.com/errata/RHSA-2026:52649
Comment 12 errata-xmlrpc 2026-08-10 10:11:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:52764 https://access.redhat.com/errata/RHSA-2026:52764
Comment 13 errata-xmlrpc 2026-08-12 00:41:27 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 Extended Update Support Long-Life Add-On

Via RHSA-2026:53989 https://access.redhat.com/errata/RHSA-2026:53989
Comment 14 errata-xmlrpc 2026-08-12 00:57:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:53990 https://access.redhat.com/errata/RHSA-2026:53990
Comment 15 errata-xmlrpc 2026-08-19 00:59:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:56573 https://access.redhat.com/errata/RHSA-2026:56573
Comment 16 errata-xmlrpc 2026-08-25 13:52:13 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.21

Via RHSA-2026:57457 https://access.redhat.com/errata/RHSA-2026:57457
Comment 17 errata-xmlrpc 2026-08-25 13:54:32 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.20

Via RHSA-2026:57543 https://access.redhat.com/errata/RHSA-2026:57543
Comment 18 errata-xmlrpc 2026-08-26 00:18:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:59663 https://access.redhat.com/errata/RHSA-2026:59663
Comment 19 errata-xmlrpc 2026-08-26 00:44:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:59662 https://access.redhat.com/errata/RHSA-2026:59662
Comment 20 errata-xmlrpc 2026-08-26 16:32:54 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.19

Via RHSA-2026:57402 https://access.redhat.com/errata/RHSA-2026:57402
Comment 21 errata-xmlrpc 2026-09-02 09:56:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Via RHSA-2026:62558 https://access.redhat.com/errata/RHSA-2026:62558
Comment 22 errata-xmlrpc 2026-09-02 13:53:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:62638 https://access.redhat.com/errata/RHSA-2026:62638
Comment 23 errata-xmlrpc 2026-09-02 14:00:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:62639 https://access.redhat.com/errata/RHSA-2026:62639
Comment 24 errata-xmlrpc 2026-09-02 14:03:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:62642 https://access.redhat.com/errata/RHSA-2026:62642
Comment 25 errata-xmlrpc 2026-09-02 14:07:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:62640 https://access.redhat.com/errata/RHSA-2026:62640
Comment 26 errata-xmlrpc 2026-09-02 14:10:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62637 https://access.redhat.com/errata/RHSA-2026:62637
Comment 27 errata-xmlrpc 2026-09-02 14:11:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:62641 https://access.redhat.com/errata/RHSA-2026:62641
Comment 28 errata-xmlrpc 2026-09-03 08:58:52 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.17

Via RHSA-2026:60019 https://access.redhat.com/errata/RHSA-2026:60019
Comment 29 errata-xmlrpc 2026-09-03 12:01:33 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.12

Via RHSA-2026:59831 https://access.redhat.com/errata/RHSA-2026:59831
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