CVE-2026-47328
AppArmor SAUCE Patch Memory Leak in Ubuntu Linux
Publication date: 2026-05-28
Last updated on: 2026-05-28
Assigner: Canonical Ltd.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| ubuntu | linux | 6.8 |
| ubuntu | linux | 6.17 |
| ubuntu | linux | 7.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-590 | The product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc(). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in Ubuntu Linux versions 6.8, 6.17, and 7.0 within the AppArmor SAUCE patches. It involves an incorrect attempt to free a pointer that was not previously allocated using kmalloc(), which is a kernel memory allocation function. At the same time, this bug causes allocated memory to leak. The issue can be triggered by an unprivileged local user.
Specifically, the bug can corrupt slab metadata, which is part of the kernel's memory management system, and may lead to resource exhaustion.
How can this vulnerability impact me? :
The vulnerability can be exploited by an unprivileged local user to cause corruption of slab metadata in the kernel memory management system. This corruption can lead to resource exhaustion, potentially causing system instability or denial of service.
Because the issue involves leaking allocated memory and improper freeing of pointers, it may degrade system performance or cause crashes, impacting availability.