# DF-1621 VERDICT

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

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

**Mechanism:** mrsas_cam.c:489-492 bcopy(cdb_ptr/cdb_bytes, CDB32, csio->cdb_len). CDB32 is u8[32] (mrsas.h:301) at offset 0x40 in 256-byte io_request frame. csio->cdb_len is u8 max 255. cdb_len>32 overwrites RaidCo

**Citation:** `sys/dev/raid/mrsas/mrsas_cam.c:489-492`

**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.