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

lowCVSS 3.3CVE-2026-68304

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of service

What: The brcmfmac WiFi driver produces a call trace warning when processing 802.1X-SHA256 authentication.
Who is affected: Systems using Broadcom WiFi driver with 802.1X-SHA256 authentication.
Urgency: Low severity (CVSS 3.3); defer to regular maintenance window.
Action: Update to a patched Linux kernel version that addresses CVE-2026-68304.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: low — CVSS 3.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68304

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-683040.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68304	coverage & exploitation status	NVD · CVE.org

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