CVE-2026-43403HIGH 8.8EPSS p2.9%

CVE-2026-43403CVE-2026-43403

Description

In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for ns iteration ioctls 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
EPSS0.13% probability of exploitation · percentile 2.9% · 2026-06-19T12:03:05Z
Published2026-05-08
Last modified2026-05-21

References

  1. https://git.kernel.org/stable/c/0ad650e60150eda789deca5e78a6a09d26bf8fc9
  2. https://git.kernel.org/stable/c/2f3dea284c761c890d676f77d5e55c0c496b4ef4
  3. https://git.kernel.org/stable/c/3376b345df155ca36d8611857b41ff7d5183fc38
  4. https://git.kernel.org/stable/c/e6b899f08066e744f89df16ceb782e06868bd148

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