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Vulnerability record · CVE-2026-64382 · published 25 July 2026

CVE-2026-64382: Linux kernel double free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_open() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_open_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.

8.8 CVSS 3.1 High EPSS 0.35% · top 73.5% CWE-415 · Double free
8.8CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
4 Sep 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_open() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_open_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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/02bc2896bdc3e29362d6e40d404006944a159c25 Patch
https://git.kernel.org/stable/c/14498ff5ce0f272ce0ef988721413e06b7038972 Patch
https://git.kernel.org/stable/c/3196b5192f246df4272072f61a2f4a3e9967f55d Patch
https://git.kernel.org/stable/c/b55e182f2324bc6a604c21a47aa6c448f719a532 Patch
https://git.kernel.org/stable/c/ff2d30927bc3bf3c629f0768d2068096e64ef5ce Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64382), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.