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Medium severity5.5NVD Advisory· Published May 8, 2026· Updated Jun 17, 2026

CVE-2026-43390

CVE-2026-43390

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.

Affected products

5
  • Linux/Kernel4 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.19,<6.19.9
    • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
    • (no CPE)
  • osv-coords
    pkg:linux/kernel
    Range: >= 6.19.0, < 6.19.9

Patches

Vulnerability mechanics

References

2

News mentions

0

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