Linux Kernel OOB Read in drm/amd/display dp_get_eq_aux_rd_interval
CVE-2026-53330 Published on July 1, 2026
drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()
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)
Products Associated with CVE-2026-53330
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Affected Versions
Linux:- Version 8e5100a575433cc185a2e224280fbd873b6692dd and below 454d3b3d499c18373f8960d31aea48338a3ca9e0 is affected.
- Version 8e5100a575433cc185a2e224280fbd873b6692dd and below dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e is affected.
- Version 8e5100a575433cc185a2e224280fbd873b6692dd and below e8b4d37eba05141ee01794fc6b7f2da808cee83b is affected.
- Version 5.6 is affected.
- Before 5.6 is unaffected.
- Version 6.18.36, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.