CVE-2026-43390

MEDIUM

nstree: tighten permission checks for listing

Title source: cna
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: nstree: tighten permission checks for listing 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.

Scores

CVSS v3 5.5
EPSS 0.0011
EPSS Percentile 1.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (9)
linux/Kernel 6.19.0 - 6.19.9linux
Linux/Linux < 6.19
Linux/Linux 6.19
Linux/Linux 6.19.9 - 6.19.*
Linux/Linux 7.0
Linux/Linux 76b6f5dfb3fda76fce1f9990d6fa58adc711122b - 0abd81645fc95ec6a9d4e4813000f22c5efc0ff4
Linux/Linux 76b6f5dfb3fda76fce1f9990d6fa58adc711122b - 8d76afe84fa2babf604b3c173730d4d2b067e361
linux/linux_kernel 7.0 rc1 (2 CPE variants)
linux/linux_kernel 6.19 - 6.19.9
Published May 08, 2026
Tracked Since May 08, 2026