CVE-2026-43391
nsfs: tighten permission checks for handle opening
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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's namespaces so they can't leak information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 8, 2026 |
| Last Updated | May 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
5222470b2fbb3740f931f189db33dd1367b1ae75 < 1797ee11451f1b2be69863a9f5bd43b948813fdf 5222470b2fbb3740f931f189db33dd1367b1ae75 < d2324a9317f00013facb0ba00b00440e19d2af5e
Linux / Linux
6.18