CVE-2026-64381
Received Received - Intake

BaseFortify

Publication date: 2026-07-25

Last updated on: 2026-07-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix next buffer leak in receive_encrypted_standard() receive_encrypted_standard() allocates next_buffer before checking whether the number of compound PDUs already reached MAX_COMPOUND. If the limit check fails, the function returns immediately and the newly allocated next_buffer is not assigned to server->smallbuf/server->bigbuf, making it leaked. Move the MAX_COMPOUND check before allocating next_buffer.

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Meta Information

Published
2026-07-25
Last Modified
2026-07-25
Generated
2026-07-25
AI Q&A
2026-07-25
EPSS Evaluated
N/A
NVD
CVE-2026-64381
EUVD
EUVD-2026-48925

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a buffer leak in the SMB client component. The function receive_encrypted_standard() allocates memory for a buffer before verifying if the maximum allowed compound PDUs (MAX_COMPOUND) has been reached. If the limit is exceeded, the function exits without assigning the buffer to the server's storage, causing a memory leak.

Impact Analysis

This vulnerability could lead to memory leaks on systems using the Linux kernel's SMB client. Over time, this may cause system performance degradation or crashes due to exhaustion of available memory resources.

Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve the buffer leak in smb client functionality.

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