01 Record

CVE-2026-23405

apparmor: fix: limit the number of levels of policy namespaces

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

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02 Description

apparmor: fix: limit the number of levels of policy namespaces

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.18% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 7.2% of scored records. A rank, not a probability.
NVD base score: 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status: Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity: No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-04-01 08:36Z7 MO AGO

Last updated

2026-05-11 22:06Z5 MO AGO

Reserved

2026-01-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.2

Document digest

2c26d6540b07d1f4f45273248c70728846ae81e5563fa8f63e3432280e5f254b

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxc88d4c7b049e87998ac0a9f455aa545cc895ef92 to < 6b396cc2f0365e684fc1d3547d18ef79fcee225d, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < 87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < b1226e37eb3754d389721c135db6107db94c7a72, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < 3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < 853ce31ca72097d23991a06876a2ccb5cb64b603, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < d42b2b6bb77ca40ee34ab74ad79305840b5f315d, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < 7b6495ead2c611647f6b11441a852324e3eb8616, c88d4c7b049e87998ac0a9f455aa545cc895ef92 to < 306039414932c80f8420695a24d4fe10c84ccfb2, 2.6.36—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/6b396cc2f0365e684fc1d3547d18ef79fcee225d
git.kernel.orghttps://git.kernel.org/stable/c/87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3
git.kernel.orghttps://git.kernel.org/stable/c/b1226e37eb3754d389721c135db6107db94c7a72
git.kernel.orghttps://git.kernel.org/stable/c/3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e
git.kernel.orghttps://git.kernel.org/stable/c/853ce31ca72097d23991a06876a2ccb5cb64b603
git.kernel.orghttps://git.kernel.org/stable/c/d42b2b6bb77ca40ee34ab74ad79305840b5f315d
git.kernel.orghttps://git.kernel.org/stable/c/7b6495ead2c611647f6b11441a852324e3eb8616
git.kernel.orghttps://git.kernel.org/stable/c/306039414932c80f8420695a24d4fe10c84ccfb2

07 Fixed in

Debian 12

linux
Fixed in 6.1.164-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.74-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.19.6-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.