CVE-2026-68304: wifi: brcmfmac: fix 802.1X-SHA256 call trace warning
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: fix 802.1X-SHA256 call trace warning
Based on wpaauth as 1x256 mode, need to set up "usefwsup" with BRCMFPROFILEFWSUP1X. Or it will happen trace warning when call brcmfcfg80211setpmk().
[ 4481.831101] ------------[ cut here ]------------ [ 4481.831102] WARNING: CPU: 1 PID: 2997 at drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7242 brcmfcfg80211setpmk+0x77/0xd0 [brcmfmac] [...] [ 4481.831202] Call Trace: [ 4481.831204] <TASK> [ 4481.831205] nl80211setpmk+0x183/0x250 [cfg80211] [ 4481.831233] genlfamilyrcvmsgdoit+0xea/0x150 [ 4481.831237] genlrcvmsg+0x104/0x240 [ 4481.831239] ? cfg80211probestatus+0x2c0/0x2c0 [cfg80211] [ 4481.831257] ? genlfamilyrcvmsgdoit+0x150/0x150 [ 4481.831259] netlinkrcvskb+0x4e/0x100 [ 4481.831261] genlrcv+0x24/0x40 [ 4481.831262] netlinkunicast+0x236/0x380 [ 4481.831264] netlinksendmsg+0x250/0x4b0 [ 4481.831266] socksendmsg+0x5c/0x70 [ 4481.831269] syssendmsg+0x236/0x2b0 [ 4481.831271] ? copymsghdrfromuser+0x6d/0xa0 [ 4481.831272] syssendmsg+0x86/0xd0 [ 4481.831274] ? avchasperm+0x8c/0x1a0 [ 4481.831276] ? preemptcountadd+0x6a/0xa0 [ 4481.831279] ? sockhasperm+0x82/0xa0 [ 4481.831280] syssendmsg+0x57/0xa0 [ 4481.831282] dosyscall64+0x38/0x90 [ 4481.831284] entrySYSCALL64afterhwframe+0x63/0xcd [ 4481.831286] RIP: 0033:0x7fd270d369b4
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68304?
CVE-2026-68304 has a risk rating of 12, indicating a critical vulnerability in the Linux kernel.
How do I fix CVE-2026-68304?
To resolve CVE-2026-68304, set up 'use_fwsup' with BRCMF_PROFILE_FWSUP_1X when using wifi brcmfmac to avoid call trace warnings.
What impact does CVE-2026-68304 have on system performance?
CVE-2026-68304 may cause trace warnings impacting system performance if not addressed.
Which systems are affected by CVE-2026-68304?
CVE-2026-68304 affects systems utilizing the Linux kernel with the brcmfmac wifi driver.
When was CVE-2026-68304 published?
CVE-2026-68304 was published on August 10, 2026.