CVE-2026-64530: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle

highCVSS 7CVE-2026-64530

CSIRTS triage

Other

What: This vulnerability handles TC_ACT_CONSUMED in tcf_qevent_handle.
Who is affected: Deployments using the net/sched subsystem.
Urgency: Remediation is advised to ensure proper functionality, with no current exploitation reported.
Action: Apply the fix for handling TC_ACT_CONSUMED in tcf_qevent_handle.

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: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64530

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-2026-645300.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64530	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownDSA-6405-1 linux - security updatedebian
unknownMultiples vulnérabilités dans le noyau Linux de Red Hat (31 juillet 2026)cert-fr-avis
criticalCVE-2026-64530: In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_api: Handle…nvd

Recent advisories for net/sched

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.

criticalCVE-2026-64530: In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_api: Handle…nvd · 2026-07-26
unknownCVE-2026-64207: In the Linux kernel, the following vulnerability has been resolved: net/sched: dualpi2: fix GS…nvd · 2026-07-20
unknownCVE-2026-64012: In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_sfb: Replac…nvd · 2026-07-19
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unknownCVE-2026-63982: In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix ethx:ingres…nvd · 2026-07-19
unknownCVE-2026-63981: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: Fix…nvd · 2026-07-19