NetSight
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medium5.5

CVE-2026-23405

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix: limit the number of levels of policy namespaces Currently the number of poli…

Impact

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix: limit the number of levels of policy namespaces Currently the number of policy namespaces is not bounded relying on the user namespace limit. However policy namespaces aren't strictly tied to user namespaces and it is possible to create them and nest them arbitrarily deep which can be used to exhaust system resource. Hard cap policy namespaces to the same depth as user namespaces.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.36.1 before 5.10.253
from 5.11 before 5.15.203
from 5.16 before 6.1.169
from 6.2 before 6.6.130
from 6.7 before 6.12.77
from 6.13 before 6.18.18

References