CVE-2026-46319: net/sched: act_ct: Only release RCU read lock after ct_ft

highCVSS 7CVE-2026-46319

CSIRTS triage

Other

What: This vulnerability involves the release of RCU read lock after ct_ft in net/sched.
Who is affected: Users of affected net/sched configurations are at risk.
Urgency: High urgency for remediation due to a CVSS score of 7 and potential impact.
Action: Apply relevant updates to net/sched to fix this issue.

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-2026-46319

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-2026-463190.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-46319	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 enable denial of servicecert-bund
unknownUSN-8668-1: Linux kernel (GCP) vulnerabilitiesubuntu
unknownUSN-8665-1: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
unknownUSN-8620-4: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
unknownUSN-8620-3: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
unknownMultiple vulnerabilities in SUSE Linux kernel (July 31, 2026)cert-fr-avis
unknownUSN-8620-2: Linux kernel (Azure FIPS) vulnerabilitiesubuntu
highUSN-8620-1: Linux kernel vulnerabilitiesubuntu
highUSN-8619-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8595-3: Linux kernel (AWS) vulnerabilitiesubuntu

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.

highCVE-2026-74704: In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_cake: drop …nvd · 2026-08-22
highCVE-2026-74700: In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_api: Always…nvd · 2026-08-22
highCVE-2026-74663: In the Linux kernel, the following vulnerability has been resolved: net/sched: reject overly d…nvd · 2026-08-22
highCVE-2026-74621: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix sk_…nvd · 2026-08-22
unknownCVE-2026-74620: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_gact, act_p…nvd · 2026-08-22
highCVE-2026-74583: In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_route: fix …nvd · 2026-08-21