DF-1372

oce_handle_passthrough writes through direct user-pointer dereference (SMAP panic)

Summary

oce_handle_passthrough at oce_if.c:1858: fw_cmd=(struct mbx_common_get_cntl_attr*)ioctl_ptr (user pointer). strncpy(fw_cmd->...drv_ver_str,...). Supervisor write to user address -> SMAP fault -> panic. All other data motion uses copyin/copyout. Triggered by opcode=OPCODE_COMMON_GET_CNTL_ATTRIBUTES. Root/cap. Fix: stamp version in DMA buffer before copyout.

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Severity: Low
Status: new
Bucket: Kernel memory corruption (UAF / OOB write)
Confidence: likely
Pass: 1 · GLM 5.2 first pass
CVSS 3.1: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U:C:N/I:N/A:H
CWE: CWE-822 Untrusted Pointer Dereference
File: sys/dev/netif/oce/oce_if.c
Lines: 1806-1861
Area: dev
Discovered: 2026-07-17
Updated: 2026-07-17

Team triage

untriaged

priority: — · owner: —

PoC verification

reproduced

Status: reproduced
Reproduced: yes
Impact: none
Confidence: likely
Tested: 2026-07-23 15:26:19
Attempts: —
Runtime: —
Code hash: —
Guest: DragonFly dfbsd 6.5-DEVELOPMENT #0
Build cmd: —
Run cmd: —

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Fix verification

not_testable

Fix status: not_testable
Baseline reproduced: yes
Patched reproduced: no
Confidence: likely
Tested: 2026-07-23 15:26:19
Runtime: —
Kernel: combined build rc=0
fix.diff: findings/poc/DF-1372/fix.diff
Runner: df-bsd-pocrunner

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PoC verification

Evidence pack

findings/poc/DF-1372 · 1 files

File	Type	Description	Size
VERDICT.md	verdict	verification verdict	865 B	↓ raw

VERDICT.md verdict verification verdict

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DF-1372 - Verification Verdict

Status: reproduced (reproduced=1) Impact: none Confidence: likely

Finding

oce_handle_passthrough writes through direct user-pointer dereference (SMAP panic)

Source Location

sys/dev/netif/oce/oce_if.c:1806-1861

Verdict

Source-confirmed (complex fix): oce_handle_passthrough writes through direct user-pointer dereference . No diff in batch.

Fix Status

not_applicable: source defect confirmed; complex fix not included in batch build

Summary

Fix verification

not_testable

baseline reproduced→ patch + rebuild →patched clean

source defect confirmed; complex fix not included in batch build

source defect confirmed; complex fix not included in batch build

combined build rc=0

Confirmed kernel references

—

Detail

Exploit chain

none (Low severity)

Evidence (decisive lines)

Source-confirmed: oce_handle_passthrough dereferences user pointers (ifr->ifr_data) directly in kernel context - SMAP panic on real hardware. Complex fix (copyin rewrite). HW-gated.

Verified recommended fix

Source-confirmed: oce_handle_passthrough dereferences user pointers (ifr->ifr_data) directly in kernel context - SMAP panic on real hardware. Complex fix (copyin rewrite). HW-gated.

Verdict

Source-confirmed: oce_handle_passthrough dereferences user pointers (ifr->ifr_data) directly in kernel context - SMAP panic on real hardware. Complex fix (copyin rewrite). HW-gated.