Integer Underflow Affecting rv package, versions <0:5.14.0-362.8.1.el9_3


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-RHEL9-RV-15555974
  • published14 Mar 2026
  • disclosed15 Sept 2025

Introduced: 15 Sep 2025

CVE-2023-53171  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

Upgrade RHEL:9 rv to version 0:5.14.0-362.8.1.el9_3 or higher.
This issue was patched in RHSA-2023:6583.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rv package and not the rv package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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 Base Scores

version 3.1