Improper access control in Linux kernel - CVE-2026-43403
Published: May 8, 2026
Vulnerability identifier: #VU130786
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43403
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local privileged user to disclose sensitive information.
The vulnerability exists due to improper access control in ns iteration ioctls when handling namespace iteration requests. A local privileged user can invoke these ioctls to disclose sensitive information.
The issue affects visibility of other privileged services' namespaces.
How to mitigate CVE-2026-43403
Install security update from vendor's repository.