apparmor: fix: limit the number of levels of policy namespaces
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 92% of all CVEs
observed exploitation
nono source reports it
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
Linux · LinuxReferences
https://git.kernel.org/stable/c/306039414932c80f8420695a24d4fe10c84ccfb2https://git.kernel.org/stable/c/3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2ehttps://git.kernel.org/stable/c/6b396cc2f0365e684fc1d3547d18ef79fcee225dhttps://git.kernel.org/stable/c/7b6495ead2c611647f6b11441a852324e3eb8616https://git.kernel.org/stable/c/853ce31ca72097d23991a06876a2ccb5cb64b603https://git.kernel.org/stable/c/87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3https://git.kernel.org/stable/c/b1226e37eb3754d389721c135db6107db94c7a72https://git.kernel.org/stable/c/d42b2b6bb77ca40ee34ab74ad79305840b5f315d