Local AppArmor escape via unchecked stacked transitions
Published Sep 17, 2026 · Updated Sep 18, 2026
AppArmor confinement bypass in Linux 6.7 through 6.18.51 and 7.0 through 7.2.5 allows local users to escape a stacked profile. The profile-label builder in security/apparmor/domain.c applies the unprivileged-transition restriction against the wrong label context instead of checking each profile against unconfined. Exploitation requires a task already confined by a stack and two executable transitions through an unconfined profile, and the resulting impact is escape from that AppArmor confinement.
Summary
What happened
AppArmor confinement bypass in Linux 6.7 through 6.18.51 and 7.0 through 7.2.5 allows local users to escape a stacked profile. The profile-label builder in security/apparmor/domain.c applies the unprivileged-transition restriction against the wrong label context instead of checking each profile against unconfined. Exploitation requires a task already confined by a stack and two executable transitions through an unconfined profile, and the resulting impact is escape from that AppArmor confinement.
The record
- CVE
- CVE-2026-90231
- Published
- Sep 17, 2026
- Updated
- Sep 18, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1562.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 17, 2026CVE publishedPublication date reported by the CVE source.
- Sep 18, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc <08c2f7c8d4b1434cfae006f3daf4d1bce330b57b
- Affected versionversion=2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc <7d1099b86356df81c379159bfb8a598aaf83ce81
- Affected versionversion=2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc <7da0bdf0610f6d35bbb061536a47fc41646306f0
- Affected versionversion=6.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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