---
cve: "CVE-2026-43390"
severity: "LOW"
cvss: 3.1
epss: "11%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-05-08 15:16:50"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T09:10:16+02:00"
---

# CVE-2026-43390

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 6.19.9

## Referenzen

- <https://git.kernel.org/stable/c/0abd81645fc95ec6a9d4e4813000f22c5efc0ff4>
- <https://git.kernel.org/stable/c/8d76afe84fa2babf604b3c173730d4d2b067e361>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-43390) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_