# DF-1867 VERDICT

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

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

**Mechanism:** kcs_start_write L182 for(retry=0;retry<10;retry++) with L196 DELAY(1000000) = full 1-second busy CPU spin no yield between retries. Each retry also 2x kcs_wait_for_ibf L184/193 each up to MAX_TIMEOUT=

**Citation:** `sys/dev/misc/ipmi/ipmi_kcs.c:182-199`

**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.