In the Linux kernel, the following vulnerability has been resolved:
alloc_tag: allocate percpu counters for module tags dynamically
When a module gets unloaded it checks whether any of its tags are still in
use and if so, we keep the memory containing module's allocation tags
alive until all tags are unused. However percpu counters referenced by
the tags are freed by free_module(). This will lead to UAF if the memory
allocated by a module is accessed after module was unloaded.
To fix this we allocate percpu counters for module allocation tags
dynamically and we keep it alive for tags which are still in use after
module unloading. This also removes the requirement of a larger
PERCPU_MODULE_RESERVE when memory allocation profiling is enabled because
percpu memory for counters does not need to be reserved anymore.
CVSS
No CVSS.
References
Configurations
No configuration.
History
18 Jun 2025, 10:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-06-18 10:15
Updated : 2025-06-18 13:46
NVD link : CVE-2025-38076
Mitre link : CVE-2025-38076
CVE.ORG link : CVE-2025-38076
JSON object : View
Products Affected
No product.
CWE
No CWE.