CVE-2026-64387

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/00b0fa425941438b664950a8ee65dfba2def4336	Patch
https://git.kernel.org/stable/c/1665f25b1dea30bf2d02e16245d203a944c9d994	Patch
https://git.kernel.org/stable/c/3317a5d015fca976475aa71df224056777316fde	Patch
https://git.kernel.org/stable/c/3409aedf3c81a810243da94164f6621c9d205c98	Patch
https://git.kernel.org/stable/c/9647492b5e41954be59d5157eddbcd4cdc1656f7	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.8:-::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc5::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc6::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc7::::::

History

No history.

Information

Published : 2026-07-25 10:17

Updated : 2026-09-04 20:43

NVD link : CVE-2026-64387

Mitre link : CVE-2026-64387

CVE.ORG link : CVE-2026-64387

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-415

Double Free

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