Description
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()

[Why & How]
The aux_rd_interval array in struct dc_lttpr_caps is declared with
MAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset
parameter passed to dp_get_eq_aux_rd_interval() can be as large as
MAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD.
This leads to an out-of-bounds read of aux_rd_interval[7] when offset
is 8.

Fix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to
accommodate the full range of valid repeater counts defined by the DP
spec.

(cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)
Published: 2026-07-01
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

An out-of-bounds read occurs in the Linux kernel DRM AMD display driver when the aux_rd_interval array, declared with seven elements, is accessed with an offset value of eight reported by a sink. This results in a read of aux_rd_interval[7], which is outside the allocated bounds, potentially exposing kernel memory contents. The flaw does not grant code execution but can leak data that could be leveraged in further attacks.

Affected Systems

All Linux kernel releases that incorporate the drm/amd/display driver are affected, regardless of distribution. The vulnerability exists in the kernel core and is not limited to a specific vendor or kernel version in the available data.

Risk and Exploitability

No CVSS score is supplied in the CVE data, so a formal severity rating cannot be assigned from the information provided. The EPSS score is unavailable, and the vulnerability is not listed in CISA KEV, indicating no documented exploitation in the wild. The attack requires a display device that supports eight LTTPR repeaters; such configurations are uncommon, which may reduce the likelihood of exploitation but do not eliminate it if the target hardware is present.

Generated by OpenCVE AI on July 1, 2026 at 18:25 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade to a Linux kernel version that includes the patch expanding aux_rd_interval to accommodate eight repeaters.
  • If an upgrade is not possible, avoid using display devices that report eight LTTPR repeaters or reconfigure the display to use fewer repeaters.
  • Continuously monitor kernel logs for anomalous read patterns and consider disabling the drm/amd/display driver if the issue persists.

Generated by OpenCVE AI on July 1, 2026 at 18:25 UTC.

Tracking

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Advisories

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History

Wed, 01 Jul 2026 18:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125

Wed, 01 Jul 2026 13:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval() [Why & How] The aux_rd_interval array in struct dc_lttpr_caps is declared with MAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset parameter passed to dp_get_eq_aux_rd_interval() can be as large as MAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD. This leads to an out-of-bounds read of aux_rd_interval[7] when offset is 8. Fix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to accommodate the full range of valid repeater counts defined by the DP spec. (cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)
Title drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-01T13:32:15.160Z

Reserved: 2026-06-09T07:44:35.398Z

Link: CVE-2026-53330

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-01T18:45:05Z

Weaknesses