# DF-1862 VERDICT

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

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

**Mechanism:** ixgbe_dcb_82599.c L321-324 u8 max_tc=0 for(i<8)if(map[i]>max_tc)max_tc=map[i] no clamp. L328 for(i=0;i<=max_tc;i++) up to 256 iters. Inside: L339-341 read hw->fc.high_water[i]/low_water[i] size 8 ixgb

**Citation:** `sys/dev/netif/ix/ixgbe_dcb_82599.c:321-328`

**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.