Bug 2482025 (CVE-2026-46054) - CVE-2026-46054 kernel: selinux: fix overlayfs mmap() and mprotect() access checks
Summary: CVE-2026-46054 kernel: selinux: fix overlayfs mmap() and mprotect() access ch...
Keywords:
Status: NEW
Alias: CVE-2026-46054
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: 2026-05-27 15:07 UTC by OSIDB Bzimport
Modified: 2026-08-10 10:11 UTC (History)
2 users (show)

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

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:25191 0 None None None 2026-06-11 06:49:33 UTC
Red Hat Product Errata RHSA-2026:27811 0 None None None 2026-06-22 10:10:47 UTC
Red Hat Product Errata RHSA-2026:27812 0 None None None 2026-06-22 09:49:45 UTC
Red Hat Product Errata RHSA-2026:30848 0 None None None 2026-06-29 04:56:21 UTC
Red Hat Product Errata RHSA-2026:51746 0 None None None 2026-08-07 18:23:09 UTC
Red Hat Product Errata RHSA-2026:52649 0 None None None 2026-08-10 05:35:26 UTC
Red Hat Product Errata RHSA-2026:52667 0 None None None 2026-08-10 07:04:15 UTC
Red Hat Product Errata RHSA-2026:52764 0 None None None 2026-08-10 10:11:49 UTC

Description OSIDB Bzimport 2026-05-27 15:07:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

selinux: fix overlayfs mmap() and mprotect() access checks

The existing SELinux security model for overlayfs is to allow access if
the current task is able to access the top level file (the "user" file)
and the mounter's credentials are sufficient to access the lower
level file (the "backing" file).  Unfortunately, the current code does
not properly enforce these access controls for both mmap() and mprotect()
operations on overlayfs filesystems.

This patch makes use of the newly created security_mmap_backing_file()
LSM hook to provide the missing backing file enforcement for mmap()
operations, and leverages the backing file API and new LSM blob to
provide the necessary information to properly enforce the mprotect()
access controls.
Comment 1 Keith Grant 2026-05-27 19:03:15 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46054-b185@gregkh/T
Comment 3 errata-xmlrpc 2026-06-11 06:49:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:25191 https://access.redhat.com/errata/RHSA-2026:25191
Comment 5 errata-xmlrpc 2026-06-22 09:49:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:27812 https://access.redhat.com/errata/RHSA-2026:27812
Comment 6 errata-xmlrpc 2026-06-22 10:10:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:27811 https://access.redhat.com/errata/RHSA-2026:27811
Comment 7 errata-xmlrpc 2026-06-29 04:56:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:30848 https://access.redhat.com/errata/RHSA-2026:30848
Comment 8 errata-xmlrpc 2026-08-07 18:23:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:51746 https://access.redhat.com/errata/RHSA-2026:51746
Comment 9 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 10 errata-xmlrpc 2026-08-10 07:04:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:52667 https://access.redhat.com/errata/RHSA-2026:52667
Comment 11 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
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