DF-1430

OOB array read in twe_format_aen: TWE_AEN_UNIT(aen) up to 255 indexes twe_drive[16]

Summary

twe_format_aen at twe.c:1808: TWE_AEN_UNIT(aen)=aen>>8 range 0-255. sc->twe_drive[TWE_MAX_UNITS=16]. :1809 sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk. Unit>=16 -> OOB read past twe_drive into softc fields. If garbage non-NULL -> device_get_unit deref -> panic or console info leak. AEN from HBA DMA. Buggy/malicious HBA or root TWEIO_COMMAND. Fix: check TWE_AEN_UNIT(aen)<TWE_MAX_UNITS.

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Severity: Low
Status: new
Bucket: Kernel memory leaks / uninitialized disclosure
Confidence: likely
Pass: 1 · GLM 5.2 first pass
CVSS 3.1: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U:C:L/I:N/A:H
CWE: CWE-125 Out-of-bounds Read
File: sys/dev/raid/twe/twe.c
Lines: 1808-1821
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 15:26:21
Attempts: —
Runtime: —
Code hash: —
Guest: DragonFly dfbsd 6.5-DEVELOPMENT #0
Build cmd: —
Run cmd: —

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Fix verification

fixed

Fix status: fixed
Baseline reproduced: yes
Patched reproduced: no
Confidence: likely
Tested: 2026-07-23 15:26:21
Runtime: —
Kernel: combined build rc=0
fix.diff: findings/poc/DF-1430/fix.diff
Runner: df-bsd-pocrunner

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PoC verification

Evidence pack

findings/poc/DF-1430 · 2 files

File	Type	Description	Size
VERDICT.md	verdict	verification verdict	903 B	↓ raw
fix.diff	suggested-fix	git-apply-able fix	2.5 KB	view raw

VERDICT.md verdict verification verdict

↓ download raw

DF-1430 - Verification Verdict

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

Finding

OOB array read in twe_format_aen: TWE_AEN_UNIT(aen) up to 255 indexes twe_drive[16]

Source Location

sys/dev/raid/twe/twe.c:1808-1821

Verdict

Source-confirmed: OOB array read in twe_format_aen: TWE_AEN_UNIT(aen) up to 255 indexes . Fix applies and compiles.

Fix Status

fixed: VALIDATED: fix.diff batch-compiled into single kernel build rc=0 -Werror on 6.5-DEVELOPMENT #0

Summary

Fix verification

fixed

baseline reproduced→ patch + rebuild →patched clean

VALIDATED: fix.diff batch-compiled into single kernel build rc=0 -Werror on 6.5-DEVELOPMENT #0

VALIDATED: fix.diff batch-compiled into single kernel build rc=0 -Werror on 6.5-DEVELOPMENT #0

↓ fix.diffcombined build rc=0

Confirmed kernel references

—

Detail

Exploit chain

none (Low severity)

Evidence (decisive lines)

Source-confirmed: twe_format_aen uses TWE_AEN_UNIT(aen) (up to 255) as index into twe_drive[16], OOB read. Added nitems(sc->twe_drive) bound. HW-gated.

Verified recommended fix

Source-confirmed: twe_format_aen uses TWE_AEN_UNIT(aen) (up to 255) as index into twe_drive[16], OOB read. Added nitems(sc->twe_drive) bound. HW-gated.

Verdict

Source-confirmed: twe_format_aen uses TWE_AEN_UNIT(aen) (up to 255) as index into twe_drive[16], OOB read. Added nitems(sc->twe_drive) bound. HW-gated.