CVE-2026-74605: eventfs: Use children field for rcu head and add memory barriers

mediumCVSS 4.1CVE-2026-74605

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Use-after-free in eventfs due to missing memory barriers and improper RCU synchronization in children field management.
Who is affected: Systems running vulnerable Linux kernel versions with eventfs tracing enabled.
Urgency: Medium priority; RCU synchronization bug in filesystem layer.
Action: Apply kernel security update addressing CVE-2026-74605 when available.

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

⚡ Watch Linux kernel

Get an email when a new Linux kernel advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74605

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-2026-746050.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74605	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for eventfs

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-2026-74606: In the Linux kernel, the following vulnerability has been resolved: eventfs: Fix use-after-fre…nvd · 2026-08-22
highCVE-2026-74605: In the Linux kernel, the following vulnerability has been resolved: eventfs: Use children fiel…nvd · 2026-08-22
mediumCVE-2026-74606: eventfs: Fix use-after-free in eventfs_remove_rec()msrc · 2026-08-11