CVE-2026-23432
mshv: Fix use-after-free in mshv_map_user_memory error path
- State
- Published
- Severity
- 7.8 High
- Published
- Apr 3, 2026
- Updated
- Aug 5, 2026
- Reserved
- Jan 13, 2026
Description
In the Linux kernel, the following vulnerability has been resolved:
mshv: Fix use-after-free in mshv_map_user_memory error path
In the error path of mshv_map_user_memory(), calling vfree() directly on the region leaves the MMU notifier registered. When userspace later unmaps the memory, the notifier fires and accesses the freed region, causing a use-after-free and potential kernel panic.
Replace vfree() with mshv_partition_put() to properly unregister the MMU notifier before freeing the region.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
LinuxLinux |
|
LinuxLinux |
|
References
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