CVE-2026-43391

HIGH EPSS 2.2%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
8.8 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.8
Exploitability
2.0
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.18  –  <6.19.9
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 2

  • git.kernel.org https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5e
    Patch