CVE-2026-46306: flow_dissector: do not dissect PPPoE PFC frames

CSIRTS triage

What

The flow_dissector does not properly handle PPPoE PFC frames, leading to potential issues.

Who is affected

Systems utilizing the flow_dissector for network traffic analysis.

Urgency

Remediation is high urgency due to the high severity rating, although exploitation has not been confirmed.

Action

Implement the recommended updates to the flow_dissector.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 7

Published

2026-06-09

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46306

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-2026-463060.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilities allow denial of servicecert-bund

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