CVE-2026-64382
smb: client: fix double-free in SMB2_open() replay
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.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
July 25, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64382
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Reset response bookkeeping before each attempt.
- Apply the resolved Linux kernel patch.
- Update the Linux kernel to a fixed version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64382.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64382 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64382
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64382 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64382 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '433042a91f9373241307725b52de573933ffedbf', 'lessThan': '02bc2896bdc3e29362d6e40d404006944a159c25', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1fffa2376922f3d1d506e49c0fd445b023a28e', 'lessThan': '3196b5192f246df4272072f61a2f4a3e9967f55d', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1fffa2376922f3d1d506e49c0fd445b023a28e', 'lessThan': '14498ff5ce0f272ce0ef988721413e06b7038972', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1fffa2376922f3d1d506e49c0fd445b023a28e', 'lessThan': 'ff2d30927bc3bf3c629f0768d2068096e64ef5ce', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1fffa2376922f3d1d506e49c0fd445b023a28e', 'lessThan': 'b55e182f2324bc6a604c21a47aa6c448f719a532', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.32', 'lessThan': '6.6.145', 'versionType': 'semver'}], 'programFiles': ['fs/smb/client/smb2pdu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/smb/client/smb2pdu.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/02bc2896bdc3e29362d6e40d404006944a159c25 Added Reference https://git.kernel.org/stable/c/14498ff5ce0f272ce0ef988721413e06b7038972 Added Reference https://git.kernel.org/stable/c/3196b5192f246df4272072f61a2f4a3e9967f55d Added Reference https://git.kernel.org/stable/c/b55e182f2324bc6a604c21a47aa6c448f719a532 Added Reference https://git.kernel.org/stable/c/ff2d30927bc3bf3c629f0768d2068096e64ef5ce