CVE-2026-64383

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64383

Key Details

CVE	CVE-2026-64383
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
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)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

smb: client: fix double-free in SMB2_flush() replay

SMB2_flush() keeps its response buffer bookkeeping across replay

attempts. If a replayable flush response is received and the retry then

fails before cifs_send_recv() stores a replacement response, flush_exit

will free the stale response pointer a second time.

Reinitialize resp_buftype and rsp_iov at the top of the replay loop so

cleanup only acts on response state produced by the current attempt.

This fixes a double-free without changing replay handling for successful

requests. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64383
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64383

Source

Reference

NVD

CVE