Improper access control in Linux kernel - CVE-2026-46054

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU132429

Improper access control in Linux kernel - CVE-2026-46054

Published: May 28, 2026


Vulnerability identifier: #VU132429
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46054
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to bypass SELinux access controls.

The vulnerability exists due to improper access control in SELinux overlayfs mmap() and mprotect() access checks when handling mmap() and mprotect() operations on overlayfs filesystems. A local user can map or change protections on an overlayfs file to bypass SELinux access controls.


Affected software

Linux kernel
Debian Linux
Anolis OS
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
openEuler
Ubuntu
kernel-rt (Red Hat package)
kernel-doc
kernel-abi-stablelists
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-devel
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
kernel-debug-modules-extra
kernel-debugsource
python3-perf-debuginfo
kernel-source
kernel-tools-debuginfo
kernel-tools-devel
perf-debuginfo
kernel-debuginfo
bpftool-debuginfo
kernel (Red Hat package)
linux (Debian package)
linux (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (Ubuntu package)

How to mitigate CVE-2026-46054

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-rt (Red Hat package) - update to 4.18.0-553.137.1.rt7.478.el8_10
kernel-doc - update to 4.18.0-553.137.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.137.1.0.1
python3-perf - update to 4.18.0-553.137.1.0.1
perf - update to 4.18.0-553.137.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.137.1.0.1
kernel-tools-libs - update to 4.18.0-553.137.1.0.1
kernel-tools - update to 4.18.0-553.137.1.0.1
kernel-modules-extra - update to 4.18.0-553.137.1.0.1
kernel-modules - update to 4.18.0-553.137.1.0.1
kernel-headers - update to 4.18.0-553.137.1.0.1
kernel-devel - update to 4.18.0-553.137.1.0.1
kernel-debug-modules - update to 4.18.0-553.137.1.0.1
kernel-debug-devel - update to 4.18.0-553.137.1.0.1
kernel-debug-core - update to 4.18.0-553.137.1.0.1
kernel-debug - update to 4.18.0-553.137.1.0.1
kernel-cross-headers - update to 4.18.0-553.137.1.0.1
kernel-core - update to 4.18.0-553.137.1.0.1
kernel - update to 4.18.0-553.137.1.0.1
bpftool - update to 4.18.0-553.137.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.137.1.0.1
kernel-debugsource - update to 6.6.0-145.1.20.157
python3-perf-debuginfo - update to 6.6.0-145.1.20.157
kernel-devel - update to 6.6.0-145.1.20.157
kernel-headers - update to 6.6.0-145.1.20.157
kernel-source - update to 6.6.0-145.1.20.157
kernel-tools - update to 6.6.0-145.1.20.157
kernel-tools-debuginfo - update to 6.6.0-145.1.20.157
kernel-tools-devel - update to 6.6.0-145.1.20.157
perf - update to 6.6.0-145.1.20.157
perf-debuginfo - update to 6.6.0-145.1.20.157
python3-perf - update to 6.6.0-145.1.20.157
kernel-debuginfo - update to 6.6.0-145.1.20.157
bpftool-debuginfo - update to 6.6.0-145.1.20.157
bpftool - update to 6.6.0-145.1.20.157
kernel - update to 6.6.0-145.1.20.157
kernel (Red Hat package) - addressed in versions 6.12.0-211.22.1.el10_2, 6.12.0-211.28.1.el10_2
linux (Debian package) - update to 6.12.95-1
linux (Ubuntu package) - update to 7.0.0-27.27
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-nvidia (Ubuntu package) - update to 7.0.0-1013.13
linux-raspi (Ubuntu package) - update to 7.0.0-1014.14

External References

Related Security Bulletins