CVE-2026-47326: CWE-401 Missing release of memory after effective lifetime in Canonical Ubuntu Linux
Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-47326) affects Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0 and is caused by a missing release of memory after its effective lifetime during the processing of large AppArmor notification responses. An unprivileged local user can trigger this memory leak, potentially causing resource exhaustion. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low complexity and no user interaction required, but no confidentiality or integrity impact, only availability impact. No vendor advisory or patch information is currently available, and no known exploits are reported in the wild.
Potential Impact
The vulnerability allows an unprivileged local user to cause a memory leak in the system, which can lead to resource exhaustion and potentially degrade system availability. There is no impact on confidentiality or integrity. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local user access to trusted users only and monitor system resource usage to detect potential exhaustion conditions.
CVE-2026-47326: CWE-401 Missing release of memory after effective lifetime in Canonical Ubuntu Linux
Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-47326) affects Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0 and is caused by a missing release of memory after its effective lifetime during the processing of large AppArmor notification responses. An unprivileged local user can trigger this memory leak, potentially causing resource exhaustion. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low complexity and no user interaction required, but no confidentiality or integrity impact, only availability impact. No vendor advisory or patch information is currently available, and no known exploits are reported in the wild.
Potential Impact
The vulnerability allows an unprivileged local user to cause a memory leak in the system, which can lead to resource exhaustion and potentially degrade system availability. There is no impact on confidentiality or integrity. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local user access to trusted users only and monitor system resource usage to detect potential exhaustion conditions.
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: 6a188e08e29bf47b501d6811
Added to database: 5/28/2026, 6:48:40 PM
Last enriched: 5/28/2026, 7:05:20 PM
Last updated: 5/29/2026, 6:28:59 PM
Views: 9
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