CVE-2026-64401

highCVSS 7.8covered by 3 sourcesfirst seen 2026-07-14

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. https://security-tracker.debian.org/tracker/DSA-6405-1

CSIRTS triage

Other

What: The smb client does not resolve SWN tcon from live registrations properly.
Who is affected: Deployments using the SMB client.
Urgency: Remediation is necessary to ensure proper SMB functionality.
Action: Apply the relevant patches once available.

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

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Exploitation outlook

Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Advisory coverage (3)

unknownDSA-6405-1 linux - security updatedebian · 2026-07-31
highCVE-2026-64401: In the Linux kernel, the following vulnerability has been resolved: smb: client: resolve SWN t…nvd · 2026-07-25
highCVE-2026-64401: smb: client: resolve SWN tcon from live registrationsmsrc · 2026-07-14

External references

NVD record for CVE-2026-64401

CVE.org record

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