---
id: CVE-2026-68304
title: 'wifi: brcmfmac: fix 802.1X-SHA256 call trace warning'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: brcmfmac: fix 802.1X-SHA256 call trace warning

  Based on wpa_auth as 1x_256 mode, need to set up
  "use_fwsup" with BRCMF_PROFILE_FWSUP_1X.
  Or it will happen trace …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    fe27cc1feecde0e6a0a9a04b7ad3262ed5f99252
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    47989a233df369c2c2263ab0a5cbd8c8dad253a5
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    d0395840e3266397de94ecd3c91e1c188c7667c6
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    137e4710da626290495b174e2eb1d5e889a4b165
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    d3ac5b35ec85c41ccf8ec524d47b520e72edaca1
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    00ebbf030d8c4a1cb89cbbae15e28332373649db
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    bd4fac033bb95fcad898cf6734e869991b2561cb
  - >-
    Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc <
    7cb34f6c4fe8a68af621d870abe63bfca2275dd6
  - Linux 4.13
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:46:51.482435Z'
published: '2026-08-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:12.546Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68304'
references:
  - url: 'https://git.kernel.org/stable/c/fe27cc1feecde0e6a0a9a04b7ad3262ed5f99252'
  - url: 'https://git.kernel.org/stable/c/47989a233df369c2c2263ab0a5cbd8c8dad253a5'
  - url: 'https://git.kernel.org/stable/c/d0395840e3266397de94ecd3c91e1c188c7667c6'
  - url: 'https://git.kernel.org/stable/c/137e4710da626290495b174e2eb1d5e889a4b165'
  - url: 'https://git.kernel.org/stable/c/d3ac5b35ec85c41ccf8ec524d47b520e72edaca1'
  - url: 'https://git.kernel.org/stable/c/00ebbf030d8c4a1cb89cbbae15e28332373649db'
  - url: 'https://git.kernel.org/stable/c/bd4fac033bb95fcad898cf6734e869991b2561cb'
  - url: 'https://git.kernel.org/stable/c/7cb34f6c4fe8a68af621d870abe63bfca2275dd6'
tags:
  - cve.org
epss: 0.00216
epssPercentile: 0.12161
ingestedAt: '2026-11-06T18:00:12.613Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: fix 802.1X-SHA256 call trace warning

Based on wpa_auth as 1x_256 mode, need to set up
"use_fwsup" with BRCMF_PROFILE_FWSUP_1X.
Or it will happen trace warning when call brcmf_cfg80211_set_pmk().

[ 4481.831101] ------------[ cut here ]------------
[ 4481.831102] WARNING: CPU: 1 PID: 2997 at
drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7242 brcmf_cfg80211_set_pmk+0x77/0xd0 [brcmfmac]
[...]
[ 4481.831202] Call Trace:
[ 4481.831204]  <TASK>
[ 4481.831205]  nl80211_set_pmk+0x183/0x250 [cfg80211]
[ 4481.831233]  genl_family_rcv_msg_doit+0xea/0x150
[ 4481.831237]  genl_rcv_msg+0x104/0x240
[ 4481.831239]  ? cfg80211_probe_status+0x2c0/0x2c0 [cfg80211]
[ 4481.831257]  ? genl_family_rcv_msg_doit+0x150/0x150
[ 4481.831259]  netlink_rcv_skb+0x4e/0x100
[ 4481.831261]  genl_rcv+0x24/0x40
[ 4481.831262]  netlink_unicast+0x236/0x380
[ 4481.831264]  netlink_sendmsg+0x250/0x4b0
[ 4481.831266]  sock_sendmsg+0x5c/0x70
[ 4481.831269]  ____sys_sendmsg+0x236/0x2b0
[ 4481.831271]  ? copy_msghdr_from_user+0x6d/0xa0
[ 4481.831272]  ___sys_sendmsg+0x86/0xd0
[ 4481.831274]  ? avc_has_perm+0x8c/0x1a0
[ 4481.831276]  ? preempt_count_add+0x6a/0xa0
[ 4481.831279]  ? sock_has_perm+0x82/0xa0
[ 4481.831280]  __sys_sendmsg+0x57/0xa0
[ 4481.831282]  do_syscall_64+0x38/0x90
[ 4481.831284]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 4481.831286] RIP: 0033:0x7fd270d369b4

## Affected

- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < fe27cc1feecde0e6a0a9a04b7ad3262ed5f99252`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < 47989a233df369c2c2263ab0a5cbd8c8dad253a5`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < d0395840e3266397de94ecd3c91e1c188c7667c6`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < 137e4710da626290495b174e2eb1d5e889a4b165`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < d3ac5b35ec85c41ccf8ec524d47b520e72edaca1`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < 00ebbf030d8c4a1cb89cbbae15e28332373649db`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < bd4fac033bb95fcad898cf6734e869991b2561cb`
- `Linux >= 2526ff21aa77c205f72e8263335f20b7d7e636fc < 7cb34f6c4fe8a68af621d870abe63bfca2275dd6`
- `Linux 4.13`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.