CVE-2026-53330

Summary

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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 454d3b3d499c18373f8960d31aea48338a3ca9e0affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e8b4d37eba05141ee01794fc6b7f2da808cee83baffected
LinuxLinux0 < 6.18.36affected
LinuxLinux0 < 7.0.13affected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References