CVE-2026-23405
apparmor: fix: limit the number of levels of policy namespaces
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 1, 2026 |
| Last Updated | Apr 13, 2026 |
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Affected Versions
Linux / Linux
c88d4c7b049e87998ac0a9f455aa545cc895ef92 < 3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e c88d4c7b049e87998ac0a9f455aa545cc895ef92 < 853ce31ca72097d23991a06876a2ccb5cb64b603 c88d4c7b049e87998ac0a9f455aa545cc895ef92 < d42b2b6bb77ca40ee34ab74ad79305840b5f315d c88d4c7b049e87998ac0a9f455aa545cc895ef92 < 7b6495ead2c611647f6b11441a852324e3eb8616 c88d4c7b049e87998ac0a9f455aa545cc895ef92 < 306039414932c80f8420695a24d4fe10c84ccfb2
Linux / Linux
2.6.36
References
git.kernel.org: https://git.kernel.org/stable/c/3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e git.kernel.org: https://git.kernel.org/stable/c/853ce31ca72097d23991a06876a2ccb5cb64b603 git.kernel.org: https://git.kernel.org/stable/c/d42b2b6bb77ca40ee34ab74ad79305840b5f315d git.kernel.org: https://git.kernel.org/stable/c/7b6495ead2c611647f6b11441a852324e3eb8616 git.kernel.org: https://git.kernel.org/stable/c/306039414932c80f8420695a24d4fe10c84ccfb2