CVE-2026-64586: wifi: brcmfmac: drain bus_reset work on device removal

mediumCVSS 5.5CVE-2026-64586

CSIRTS triage

Other

What: CVE-2026-64586 has no summary or technical details available.
Who is affected: Details are not available to determine affected deployments.
Urgency: Medium priority baseline; CVSS 5.5 indicates moderate severity without exploitation confirmation.
Action: Monitor for updated information and advisory details when published.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64586

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-2026-645860.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64586	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for wifi

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-64586: In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: drain bus_…nvd · 2026-08-06
mediumCVE-2024-36922: wifi: iwlwifi: read txq->read_ptr under lockmsrc · 2026-08-06
mediumCVE-2025-71227: wifi: mac80211: don't WARN for connections on invalid channelsmsrc · 2026-08-06
mediumCVE-2024-49937: wifi: cfg80211: Set correct chandef when starting CACmsrc · 2026-08-06
lowCVE-2026-64571: wifi: p54: validate RX frame length in p54_rx_eeprom_readback()msrc · 2026-08-06
mediumCVE-2026-43172: wifi: iwlwifi: fix 22000 series SMEM parsingmsrc · 2026-08-06