CVE-2026-47327: CWE-476 NULL pointer dereference in Canonical Ubuntu Linux
Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor notifications. The bug can be triggered by an unprivileged local user. This can lead to a kernel oops.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-47327) affects Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0, where a NULL pointer dereference occurs in the AppArmor notification handling code. An unprivileged local user can trigger this condition, leading to a kernel oops, which is a form of system crash or instability. The issue is classified under CWE-476 (NULL Pointer Dereference). The CVSS v3.1 base score is 3.3, indicating low severity, with attack vector local, low complexity, and no impact on confidentiality or integrity, only availability.
Potential Impact
The impact of this vulnerability is limited to causing a kernel oops, which may result in a denial of service by crashing or destabilizing the affected system. There is no indication of confidentiality or integrity compromise. Exploitation requires local access and does not involve user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, users should monitor Canonical's advisories for updates. Until a patch is available, restricting local user access and limiting exposure to untrusted users may reduce risk.
CVE-2026-47327: CWE-476 NULL pointer dereference in Canonical Ubuntu Linux
Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor notifications. The bug can be triggered by an unprivileged local user. This can lead to a kernel oops.
CVSS v3.1
Score 3.3low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-47327) affects Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0, where a NULL pointer dereference occurs in the AppArmor notification handling code. An unprivileged local user can trigger this condition, leading to a kernel oops, which is a form of system crash or instability. The issue is classified under CWE-476 (NULL Pointer Dereference). The CVSS v3.1 base score is 3.3, indicating low severity, with attack vector local, low complexity, and no impact on confidentiality or integrity, only availability.
Potential Impact
The impact of this vulnerability is limited to causing a kernel oops, which may result in a denial of service by crashing or destabilizing the affected system. There is no indication of confidentiality or integrity compromise. Exploitation requires local access and does not involve user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, users should monitor Canonical's advisories for updates. Until a patch is available, restricting local user access and limiting exposure to untrusted users may reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-05-19T10:37:36.433Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a188e08e29bf47b501d6814
Added to database: 5/28/2026, 6:48:40 PM
Last enriched: 5/28/2026, 7:05:14 PM
Last updated: 5/29/2026, 8:19:55 AM
Views: 7
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