Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.19, < 7.0.4 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/82544d36b1729153c8aeb179e84750f0c085d3b1Patch
- https://git.kernel.org/stable/c/8bacd09f12c27710228562e4d13163e58c5f4a45
- https://git.kernel.org/stable/c/bc6c380c1159de52a252ed11f19a42c47f60a735
- https://git.kernel.org/stable/c/cd0e707a927a70cdfd8bc5a512a9719a87f5ed51Patch
- https://git.kernel.org/stable/c/d844702198395d3f80222777030f69db6be6b709
- https://access.redhat.com/errata/RHSA-2026:25191
- https://access.redhat.com/errata/RHSA-2026:27811
- https://access.redhat.com/errata/RHSA-2026:27812
- https://access.redhat.com/errata/RHSA-2026:30848
- https://access.redhat.com/errata/RHSA-2026:51746
- https://access.redhat.com/errata/RHSA-2026:52649
- https://access.redhat.com/errata/RHSA-2026:52667
- https://access.redhat.com/errata/RHSA-2026:52764
- https://access.redhat.com/security/cve/CVE-2026-46054
- https://bugzilla.redhat.com/show_bug.cgi?id=2482025
FAQ
What is CVE-2026-46054?
CVE-2026-46054 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...
How severe is CVE-2026-46054?
CVE-2026-46054 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46054?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.