CVE-2026-46054
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 7.1 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-862 · Missing authorization
- Record status
- Modified
Affected
- Linux Kernel < 7.0.4
Attack profile CVSS 3.1 · 7.1
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-46054.md and follow it. Check whether this project is affected by CVE-2026-46054. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/82544d36b1729153c8aeb179e84750f0c085d3b1
- https://git.kernel.org/stable/c/cd0e707a927a70cdfd8bc5a512a9719a87f5ed51
References
- https://git.kernel.org/stable/c/82544d36b1729153c8aeb179e84750f0c085d3b1
- https://git.kernel.org/stable/c/8bacd09f12c27710228562e4d13163e58c5f4a45
- https://git.kernel.org/stable/c/bc6c380c1159de52a252ed11f19a42c47f60a735
- https://git.kernel.org/stable/c/cd0e707a927a70cdfd8bc5a512a9719a87f5ed51
- 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/errata/RHSA-2026:59091
- https://access.redhat.com/errata/RHSA-2026:59473
- https://access.redhat.com/errata/RHSA-2026:67721
- https://access.redhat.com/errata/RHSA-2026:67723
- https://access.redhat.com/security/cve/CVE-2026-46054
- https://bugzilla.redhat.com/show_bug.cgi?id=2482025
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46054.json