CVE-2026-43391

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

08/05/2026

Last modified:

26/05/2026

Description

In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for handle opening Even privileged services should not necessarily be able to see other privileged service&#39;s namespaces so they can&#39;t leak information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	6.18 (including)	6.19.9 (excluding)
cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-43391

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools