CVE-2023-53171
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-09-15
Last updated on: 2025-12-02
Assigner: kernel.org
Description
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 3.6 (inc) to 5.10.173 (exc) |
| linux | linux_kernel | From 5.11 (inc) to 5.15.99 (exc) |
| linux | linux_kernel | From 5.16 (inc) to 6.1.16 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.2.3 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-NVD-CWE-noinfo |
