# DF-1618 VERDICT

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

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

**Mechanism:** dce120_timing_generator.c:107-111 v_blank = (v_total - v_addressable - v_border_top - v_border_bottom) * interlace_factor. All uint32_t; if v_addressable + borders > v_total the subtraction wraps to ~

**Citation:** `sys/dev/drm/amd/display/dc/dce120/dce120_timing_generator.c:107-126`

**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.