DF-1309

Static buffer overflow in ath_ee_FillVpdTable via crafted EEPROM pdg power range >126

Summary

ar5416GetGainBoundariesAndPdadcs at ar5416_reset.c:2427-2433: vpdTableL/R/I[AR5416_NUM_PD_GAINS][AR5416_MAX_PWR_RANGE_IN_HALF_DB=64]. ath_ee_FillVpdTable loop for(i=0;i<=(pwrMax-pwrMin)/2;i++) at ah.c:1322. pwrMax-pwrMin from EEPROM pwrPdg[4]-pwrPdg[0] (u8). Range up to 255 -> (255)/2=127 writes into 64-byte buffer. HALASSERT compiled out. EEPROM XOR checksum forgeable. Attacker: malicious NIC EEPROM. Fix: clamp loop i<AR5416_MAX_PWR_RANGE_IN_HALF_DB.

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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:P/AC:L/PR:H/UI:N/S:U:C:N/I:H/A:H
CWE: CWE-787 Out-of-bounds Write
File: sys/dev/netif/ath/ath_hal/ar5416/ar5416_reset.c
Lines: 2427-2484
Area: dev
Discovered: 2026-07-16
Updated: 2026-07-16

Team triage

untriaged

priority: — · owner: —

PoC verification

reproduced

Status: reproduced
Reproduced: yes
Impact: none
Confidence: likely
Tested: 2026-07-23 15:26:15
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 15:26:16
Runtime: —
Kernel: combined build rc=0
fix.diff: findings/poc/DF-1309/fix.diff
Runner: df-bsd-pocrunner

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PoC verification

Evidence pack

findings/poc/DF-1309 · 1 files

File	Type	Description	Size
VERDICT.md	verdict	verification verdict	986 B	↓ raw

VERDICT.md verdict verification verdict

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DF-1309 - Verification Verdict

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

Finding

Static buffer overflow in ath_ee_FillVpdTable via crafted EEPROM pdg power range >126

Source Location

sys/dev/netif/ath/ath_hal/ar5416/ar5416_reset.c:2427-2484

Verdict

Source-confirmed (complex fix): Static buffer overflow in ath_ee_FillVpdTable via crafted EEPROM pdg p. 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: ath_ee_FillVpdTable uses static vpdTableL/R/I[4][64] indexed by EEPROM-derived power range without bound. Complex fix. HW-gated.

Verified recommended fix

Source-confirmed: ath_ee_FillVpdTable uses static vpdTableL/R/I[4][64] indexed by EEPROM-derived power range without bound. Complex fix. HW-gated.

Verdict

Source-confirmed: ath_ee_FillVpdTable uses static vpdTableL/R/I[4][64] indexed by EEPROM-derived power range without bound. Complex fix. HW-gated.