# DF-1872 VERDICT

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

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

**Mechanism:** SYSCTL_INT L114 _kern_dcons poll_hz CTLFLAG_RW NULL handler so generic sysctl_handle_int accepts any value including 0 (only SYSCAP_NOSYSCTL_WR enforced kern_sysctl.c:1446). dcons_timeout L353 and dco

**Citation:** `sys/dev/misc/dcons/dcons_os.c:353-512`

**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.