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

highCVSS 7CVE-2026-46306

CSIRTS triage

Other

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 32% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-46306	coverage & exploitation status	NVD · CVE.org

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
unknownUSN-8665-1: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
highUSN-8619-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8595-3: Linux kernel (AWS) vulnerabilitiesubuntu
highUSN-8574-3: Linux kernel vulnerabilitiesubuntu
highUSN-8618-1: Linux kernel vulnerabilitiesubuntu
highUSN-8609-1: Linux kernel (Azure CVM) vulnerabilitiesubuntu
highUSN-8608-1: Linux kernel (Azure FIPS) vulnerabilitiesubuntu
highUSN-8607-1: Linux kernel (Azure CVM) vulnerabilitiesubuntu
highUSN-8606-1: Linux kernel (Azure) vulnerabilitiesubuntu

Recent advisories for flow_dissector

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-2026-72444: In the Linux kernel, the following vulnerability has been resolved: flow_dissector: check devi…nvd · 2026-08-15