Kernel-level RCE in the Linux kernel affects servers, cloud, workstations and embedded devices broadly and requires widespread remediation.
CVE-2026-64067
Linux kernel netfs memory-barrier race allows kernel-level RCE
Is CVE-2026-64067 being exploited?
Not confirmed. CVE-2026-64067 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-64067?
CVE-2026-64067 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-64067?
Yes. A fix has been recorded for CVE-2026-64067. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64067 affect?
CVE-2026-64067 affects Linux kernel (netfs subsystem), Servers, Cloud instances, Workstations, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64067?
Install vendor/kernel security updates and reboot affected systems immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Race condition in netfs list handling can enable kernel remote code execution and full host compromise.
Immediate action required
- affected>= 288ace2f57c9d06dd2e42bd80d03747d879a4068 and < 293a4532c36f38458e38b8879b174ab797718b9d
- affected>= 288ace2f57c9d06dd2e42bd80d03747d879a4068 and < b5782e2d462c028096f922abca46318cec890670
- affected6.10
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.