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CVE-2023-53258

drm/amd/display: Fix possible underflow for displays with large vblank

MEDIUM
5.5
CVSS Score
Published: September 15, 2025 at 02:46 PM UTC
Updated: June 17, 2026 at 06:44 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.0 ≤ v < 6.1.436.0 ≤ v < 6.4.86.0 ≤ v < 6.56.0.1 ≤ v < 6.1.436.2 ≤ v < 6.4.84c3861f587400db00801810eb8034c7b480e21dd6.06.0 rc26.0 rc36.0 rc46.0 rc56.0 rc66.0 rc7
Vendor states this is fixed in 1a4bcdbea4319efeb26cc4b05be859a7867e02dc (fixed)
Vendor states this is fixed in 64bc8e10c87adf60b2d32aacf3afb288e51d5a62 (fixed)
Vendor states this is fixed in d5741133e6e2f304b40ca1da0e16f62af06f4d22 (fixed)
Vendor states this is fixed in 6.0 (unaffected)
Vendor states this is fixed in 6.1.43 (unaffected)
Vendor states this is fixed in 6.4.8 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1a4bcdbea4319efeb26cc4b05be859a7867e02dc
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/64bc8e10c87adf60b2d32aacf3afb288e51d5a62
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d5741133e6e2f304b40ca1da0e16f62af06f4d22

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-191

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