CVE-2026-64117: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb

highCVSS 7.1CVE-2026-64117

CSIRTS triage

vendor: Linux product: mac80211Other

What: The vulnerability allows capturing fast-RX rates before mesh reuses skb->cb, potentially leading to information leakage.
Who is affected: Deployments using the mac80211 subsystem in the Linux kernel.
Urgency: Remediation is urgent due to a CVSS score of 7.1, indicating a significant risk.
Action: Update to the patched version of the kernel that resolves CVE-2026-64117.

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: high — CVSS 7.1
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64117

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-2026-641170.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64117	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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