⬢ DragonFlyBSD Kernel Audit
DF-3881 / manifest.json
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{
  "finding_id": "DF-3881",
  "artifact_dir": "findings/poc/DF-3881/",
  "verdict": "not_reproduced",
  "impact_assessed": "kernel stack/heap OOB write + kernel stack exhaustion from malicious DP MST hub (hardware-gated, source-certain)",
  "reproduce": {
    "build": "cc -O2 -Wall -o mst_lct_model mst_lct_model.c",
    "run": "./mst_lct_model",
    "expected": "table of first-OOB depths: stack rad[6] at parent_lct=13, heap mstb->rad[8] and hdr rad[8] at parent_lct=17, dump prefix[10] at lct=10; recursion-exhaustion estimate ~depth 54"
  },
  "kernel_refs": [
    "sys/dev/drm/drm_dp_mst_topology.c:1052-1066",
    "sys/dev/drm/drm_dp_mst_topology.c:1071-1095",
    "sys/dev/drm/drm_dp_mst_topology.c:840-854",
    "sys/dev/drm/drm_dp_mst_topology.c:1484-1485",
    "sys/dev/drm/drm_dp_mst_topology.c:1639-1641",
    "sys/dev/drm/drm_dp_mst_topology.c:2954-2964",
    "sys/dev/drm/include/drm/drm_dp_mst_helper.h:125"
  ],
  "artifacts": [
    "README.md", "VERDICT.md", "mst_lct_model.c", "build.sh", "run.sh",
    "build.log", "run.log", "env.txt", "fix.diff", "manifest.json", "verdict.json"
  ]
}