CVE-2026-43391HIGH 8.8EPSS p2.2%

CVE-2026-43391CVE-2026-43391

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'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.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS0.12% probability of exploitation · percentile 2.2% · 2026-06-18T12:00:27Z
Published2026-05-08
Last modified2026-05-26

References

  1. https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdf
  2. https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5e

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.