CVE-2026-23405
apparmor: fix: limit the number of levels of policy namespaces
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.36
References 8
git.kernel.org
- stable/c/6b396cc2f0365e684fc1d3547d18ef79fcee225d
- stable/c/87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3
- stable/c/b1226e37eb3754d389721c135db6107db94c7a72
- stable/c/3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e
- stable/c/853ce31ca72097d23991a06876a2ccb5cb64b603
- stable/c/d42b2b6bb77ca40ee34ab74ad79305840b5f315d
- stable/c/7b6495ead2c611647f6b11441a852324e3eb8616
- stable/c/306039414932c80f8420695a24d4fe10c84ccfb2