CVE-2026-53330
UnknownSummary
In the Linux kernel, a vulnerability was found in the DRM driver for AMD Display, specifically an out-of-bounds read in dp_get_eq_aux_rd_interval(). The aux_rd_interval array in struct dc_lttpr_caps was declared with 7 elements, but the offset parameter can be 8 when a sink reports 8 LTTPR repeaters, causing a read beyond allocated memory.
Risk Assessment
This vulnerability may lead to system instability, potential information disclosure, or kernel panic, affecting the overall security and reliability of the operating system.
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit a55a458a8df37a65ffda5cf721d554a8f74f6b04) or apply the appropriate security patch provided by your distribution.
Original NVD description (English source)
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)