CVE-2023-53171

MEDIUM EPSS 4.1%
Published Sep 15, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥3.6  –  <5.10.173
linuxlinux_kernel*≥5.11  –  <5.15.99
linuxlinux_kernel*≥5.16  –  <6.1.16
linuxlinux_kernel*≥6.2  –  <6.2.3

References 5

  • git.kernel.org https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7
    Patch