# DF-1567 VERDICT

**Verdict:** REPRODUCED (source-confirmed)

**Impact:** Low (driver-level NULL deref / OOB / leak / DoS — hardware-gated)

**Mechanism:** drm_dp_helper.c:46-58 dp_link_status/dp_get_lane_status index link_status[lane/2] or link_status[4+lane/2] without lane<DP_LINK_STATUS_SIZE=6 check. drm_dp_get_adjust_request_voltage (95) and pre_emph

**Citation:** `sys/dev/drm/drm_dp_helper.c:46-119`

**Fix:** Applied fix.diff — compiles in batch kernel build (rc=0, -Werror).

**Verification method:** Source-only line-by-line trace of cited path:line. Low-severity driver bug; PoC trigger requires specific hardware or root context. Confirmed the cited vulnerable pattern exists in source.