DF-1447

OOB read of static wordsForPdgains[] when EEPROM xpd_mask has no set bits (numPdGains=0)

Summary

readEepromRawPowerCalInfo2413 at ah_eeprom_v3.c:763-764/781-782: wordsForPdgains[numPdGains-1]. wordsForPdgains[4]={4,6,9,12}. numPdGains from 4-bit EEPROM ee_xgain, can be 0. numPdGains-1=-1 -> wordsForPdgains[-1] OOB read of adjacent .rodata. Garbage feeds EEPROM offset calc. Crafted EEPROM on AR2413. No write/userspace leak. Fix: check numPdGains>=1 before indexing.

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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:P/AC:L/PR:N/UI:N/S:U:C:N/I:N/A:L
CWE: CWE-125 Out-of-bounds Read
File: sys/dev/netif/ath/ath_hal/ah_eeprom_v3.c
Lines: 763-782
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 15:26:22
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 15:26:22
Runtime: —
Kernel: combined build rc=0
fix.diff: findings/poc/DF-1447/fix.diff
Runner: df-bsd-pocrunner

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PoC verification

Evidence pack

findings/poc/DF-1447 · 2 files

File	Type	Description	Size
VERDICT.md	verdict	verification verdict	911 B	↓ raw
fix.diff	suggested-fix	git-apply-able fix	1.1 KB	view raw

VERDICT.md verdict verification verdict

↓ download raw

DF-1447 - Verification Verdict

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

Finding

OOB read of static wordsForPdgains[] when EEPROM xpd_mask has no set bits (numPdGains=0)

Source Location

sys/dev/netif/ath/ath_hal/ah_eeprom_v3.c:763-782

Verdict

Source-confirmed: OOB read of static wordsForPdgains[] when EEPROM xpd_mask has no set b. 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: ath EEPROM v3 wordsForPdgains[numPdGains-1] accessed without checking numPdGains>0 and <=nitems, OOB read when EEPROM xpd_mask has no set bits. Added bounds check. HW-gated.

Verified recommended fix

Source-confirmed: ath EEPROM v3 wordsForPdgains[numPdGains-1] accessed without checking numPdGains>0 and <=nitems, OOB read when EEPROM xpd_mask has no set bits. Added bounds check. HW-gated.

Verdict

Source-confirmed: ath EEPROM v3 wordsForPdgains[numPdGains-1] accessed without checking numPdGains>0 and <=nitems, OOB read when EEPROM xpd_mask has no set bits. Added bounds check. HW-gated.