Improper access control in Linux kernel - CVE-2026-43391
Published: May 8, 2026
Vulnerability identifier: #VU130792
CSH Severity: Low
CVSS v4: 4.6 [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]
CVE-ID: CVE-2026-43391
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to disclose sensitive information.
The vulnerability exists due to improper access control in nsfs when opening namespace handles. A local privileged user can open handles to namespaces belonging to other privileged services to disclose sensitive information.
Affected software
Linux kernel
How to mitigate CVE-2026-43391
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3