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CVE-2026-64078: netfilter: x_tables: add and use xtables_unregister_table_exit

criticalCVSS 9.8CVE-2026-64078

CSIRTS triage

vendor: Linuxproduct: NetfilterOther
What
The vulnerability involves the addition and use of xtables_unregister_table_exit, which may lead to instability.
Who is affected
Deployments using the Netfilter framework in the Linux kernel.
Urgency
Remediation is critical due to the high CVSS score of 9.8, indicating severe potential impact.
Action
Apply the latest kernel patch that addresses CVE-2026-64078.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64078

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-64078coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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