CVE-2023-53258
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-12-02

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix possible underflow for displays with large vblank [Why] Underflow observed when using a display with a large vblank region and low refresh rate [How] Simplify calculation of vblank_nom Increase value for VBlankNomDefaultUS to 800us
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Meta Information
Published
2025-09-15
Last Modified
2025-12-02
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-14
NVD
CVE-2023-53258
Affected Vendors & Products
Showing 9 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.0.1 (inc) to 6.1.43 (exc)
linux linux_kernel From 6.2 (inc) to 6.4.8 (exc)
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-191 The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
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Executive Summary

This vulnerability in the Linux kernel's AMD display driver involves a possible underflow condition when using displays with a large vertical blanking (vblank) region and a low refresh rate. The issue arises from the calculation of the vblank_nom value, which was simplified and adjusted to prevent this underflow by increasing the default vblank nominal value to 800 microseconds.

Impact Analysis

The underflow in the display driver could potentially cause display issues such as flickering, instability, or incorrect rendering on affected displays with large vblank regions and low refresh rates. This may degrade the user experience or cause visual artifacts.

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