# DF-1647 VERDICT

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

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

**Mechanism:** vinumrequest.c:491 sd=NULL for compiler quiet. 492 for(sdno=0;sdno<plex->subdisks;sdno++) zero iterations if subdisks==0. 556 if(diskend>sd->sectors+sd->plexoffset) derefs NULL->sectors -> panic. Plex

**Citation:** `sys/dev/raid/vinum/vinumrequest.c:491-556`

**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.