# CVE-2026-68304: wifi: brcmfmac: fix 802.1X-SHA256 call trace warning

Status: published. Published: 2026-08-10. Updated: 2026-11-06.

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

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < fe27cc1feecde0e6a0a9a04b7ad3262ed5f99252 (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < 47989a233df369c2c2263ab0a5cbd8c8dad253a5 (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < d0395840e3266397de94ecd3c91e1c188c7667c6 (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < 137e4710da626290495b174e2eb1d5e889a4b165 (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < d3ac5b35ec85c41ccf8ec524d47b520e72edaca1 (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < 00ebbf030d8c4a1cb89cbbae15e28332373649db (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < bd4fac033bb95fcad898cf6734e869991b2561cb (affected, git); ≥ 2526ff21aa77c205f72e8263335f20b7d7e636fc; < 7cb34f6c4fe8a68af621d870abe63bfca2275dd6 (affected, git). Source: CNA: Linux
- Linux / Linux: 4.13 (affected); ≥ 0; < 4.13 (unaffected, semver); ≥ 5.10.265; ≤ 5.10.* (unaffected, semver); ≥ 5.15.216; ≤ 5.15.* (unaffected, semver); ≥ 6.1.183; ≤ 6.1.* (unaffected, semver); ≥ 6.6.148; ≤ 6.6.* (unaffected, semver); ≥ 6.12.101; ≤ 6.12.* (unaffected, semver); ≥ 6.18.42; ≤ 6.18.* (unaffected, semver); ≥ 7.1.6; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.13%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/fe27cc1feecde0e6a0a9a04b7ad3262ed5f99252 (CNA: Linux)

- https://git.kernel.org/stable/c/47989a233df369c2c2263ab0a5cbd8c8dad253a5 (CNA: Linux)

- https://git.kernel.org/stable/c/d0395840e3266397de94ecd3c91e1c188c7667c6 (CNA: Linux)

- https://git.kernel.org/stable/c/137e4710da626290495b174e2eb1d5e889a4b165 (CNA: Linux)

- https://git.kernel.org/stable/c/d3ac5b35ec85c41ccf8ec524d47b520e72edaca1 (CNA: Linux)

- https://git.kernel.org/stable/c/00ebbf030d8c4a1cb89cbbae15e28332373649db (CNA: Linux)

- https://git.kernel.org/stable/c/bd4fac033bb95fcad898cf6734e869991b2561cb (CNA: Linux)

- https://git.kernel.org/stable/c/7cb34f6c4fe8a68af621d870abe63bfca2275dd6 (CNA: Linux)

- https://git.kernel.org/stable/c/00ebbf030d8c4a1cb89cbbae15e28332373649db (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/137e4710da626290495b174e2eb1d5e889a4b165 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/47989a233df369c2c2263ab0a5cbd8c8dad253a5 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/7cb34f6c4fe8a68af621d870abe63bfca2275dd6 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/bd4fac033bb95fcad898cf6734e869991b2561cb (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/d0395840e3266397de94ecd3c91e1c188c7667c6 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/d3ac5b35ec85c41ccf8ec524d47b520e72edaca1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/fe27cc1feecde0e6a0a9a04b7ad3262ed5f99252 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-68304; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68304; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-68304; retrieved 2026-11-06; source updated Not reported

Revision: cdfdddf0d77ca4be407b240566cfa679f33b9afd6ac8ec9b10a4f0038509409a

Canonical: https://y2.dev/cve/CVE-2026-68304

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