CVE Watch19 oct 2026

CVE-2026-46054

In the Linux kernel, the following vulnerability has been resolved: selinux: fix overlayfs mmap() and mprotect() access checks The existin

CVSS

7.1

Alto

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 27 may 2026 · Última mod.: 19 oct 2026 · CWE-862 · CWE-280

EPSS · 30d

0.1%EPSS · 30 días0.2%

2026-09-262026-10-25

Descripción técnica

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.

Referencias oficiales

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