NONE
CVE-2026-23405
Published: April 1, 2026· Updated: Apr 1, 2026
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.6th
Official Description
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.
Technical Analysis
CVE-2026-23405 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
Affected Vendors & Products
Mentioned vendors (from description):
Linux
CPE data not yet available in NVD for this CVE.
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (5)
Quick Facts
CVE IDCVE-2026-23405
SeverityNONE
CISA KEVNo
EPSS (30d)0.02%
PublishedApr 1, 2026
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-23405 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.