Out-of-bounds read in Ubuntu Linux AppArmor notification handling
Published May 28, 2026
7.8
HIGHCVSS 3.1
EPSS 0.15%
Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the size of an internal buffer, leading to a heap memory out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result in invalid data being processed by the AppArmor DFA policy engine.
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:H/I:H/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
TotalDecision
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 | 0.15% (0.00154) | 3.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.11% (0.00107) | 1.36th | v5 (v2026.06.15) |
| May 29, 2026 | 0.01% (0.00013) | 2.18th | v4 (v2025.03.14) |
References (1)
Change history (0)
No recorded changes yet.