In the Linux kernel, the following vulnerability has been resolved:
vfio/type1: prevent underflow of locked_vm via exec()
When a vfio container is preserved across exec, the task does not change,
but it gets a new mm with locked_vm=0, and loses the count from existing
dma mappings. If the user later unmaps a dma mapping, locked_vm underflows
to a large unsigned value, and a subsequent dma map request fails with
ENOMEM in __account_locked_vm.
To avoid underflow, grab and save the mm at the time a dma is mapped.
Use that mm when adjusting locked_vm, rather than re-acquiring the saved
task's mm, which may have changed. If the saved mm is dead, do nothing.
locked_vm is incremented for existing mappings in a subsequent patch.
References
Configurations
Configuration 1 (hide)
|
History
02 Dec 2025, 02:58
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026 - Patch | |
| References | () https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3 - Patch | |
| References | () https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17 - Patch | |
| References | () https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b - Patch | |
| References | () https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7 - Patch |
Information
Published : 2025-09-15 14:15
Updated : 2025-12-02 02:58
NVD link : CVE-2023-53171
Mitre link : CVE-2023-53171
CVE.ORG link : CVE-2023-53171
JSON object : View
Products Affected
linux
- linux_kernel
CWE