High 8.8Published Jul 25, 2026

CVE-2026-64382smb: client: fix double-free in SMB2_open() replay

Updated under an hour ago (Oct 28, 2026, 12:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-415
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	433042a91f9373241307725b52de573933ffedbf builds before 02bc2896bdc3e29362d6e40d404006944a159c25; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before 3196b5192f246df4272072f61a2f4a3e9967f55d; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before 14498ff5ce0f272ce0ef988721413e06b7038972; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before ff2d30927bc3bf3c629f0768d2068096e64ef5ce; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before b55e182f2324bc6a604c21a47aa6c448f719a532; from 6.6.32 before 6.6.145	CNA record
linux linux_kernel linux:linux_kernel	from 6.6.32 before 6.6.145; from 6.8.1 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 6.8; 6.8; 6.8; 6.8; and 3 more ranges	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.