Deadlock or kernel panic in Ubuntu Linux AppArmor notification handling
Published May 28, 2026
5.5
MEDIUMCVSS 3.1
EPSS 0.10%
Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock in notification handling code. The bug can be triggered by an unprivileged local user and can result in kernel panic or deadlock.
Affected products
-
- Version 6.17.0StatusaffectedConstraints<6.17.0-35.35
- Version 6.8.0StatusaffectedConstraints<6.8.0-124.124
- Version 7.0.0StatusaffectedConstraints<7.0.0-22.22
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Canonical | Ubuntu Linux | unaffected |
|
- 24.04
- 25.10
- 26.04
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.10% (0.00103) | 0.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.08% (0.00078) | 0.17th | v5 (v2026.06.15) |
| May 29, 2026 | 0.01% (0.00012) | 1.72th | v4 (v2025.03.14) |
References (1)
Change history (0)
No recorded changes yet.