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CVE-2026-64387

Last refreshed2026-10-17

Status: UPDATED  |  Advisory ID: CVE-2026-64387

Key Details

CVECVE-2026-64387
CVSS Score / Version
9.8 (Critical) / CVSS v3.1
Updated2026-10-16
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Linux Kernel
Classified as
CWE-415 (Double Free)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix query directory replay double-free

A response-bearing attempt can return a replayable error and free its

response buffer. If SMB2_query_directory_init() fails before the next send,

cleanup retains the previous buffer type and frees that response again.

Reset response bookkeeping before each attempt to prevent the stale free. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-64387
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-64387

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