Linux kernel netfilter bug affects widely deployed kernels used across servers, appliances and cloud hosts; high CVSS 9.8 risk of DoS or privilege escalation.
CVE-2026-64150
Linux netfilter bug can crash kernel or enable local privilege escalation.
Is CVE-2026-64150 being exploited?
Not confirmed. CVE-2026-64150 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 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-64150?
CVE-2026-64150 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-2026-64150?
Yes. A fix has been recorded for CVE-2026-64150. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64150 affect?
CVE-2026-64150 affects Linux kernel (netfilter/nftables), Linux distributions with vulnerable kernels (Ubuntu/RHEL/Debian/etc.), Network appliances using Linux kernel. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64150?
Apply vendor kernel updates or backported fixes immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted netfilter/nft interactions can trigger kernel crash (DoS) and may allow local privilege escalation or code execution via locking/softirq misuse.
Immediate action required
- affected>= ba36fada9ab487634f61f92769c95bc148aa8f49 and < df19b6af171695a1352314597c9a4311d48d5171
- affected>= ba36fada9ab487634f61f92769c95bc148aa8f49 and < 6fecd39c6401134b58505bc4eb1adc8a0e2fe992
- affected>= ba36fada9ab487634f61f92769c95bc148aa8f49 and < a6cb3ff979855f7f0ee9450a947fe8f96c2ba37a
- affected6.16
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.