CVE-2026-46068
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Memory Leak in Linux Kernel Crypto NX Module

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: crypto: nx - fix bounce buffer leaks in nx842_crypto_{alloc,free}_ctx The bounce buffers are allocated with __get_free_pages() using BOUNCE_BUFFER_ORDER (order 2 = 4 pages), but both the allocation error path and nx842_crypto_free_ctx() release the buffers with free_page(). Use free_pages() with the matching order instead.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-46068
EUVD
EUVD-2026-32450
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 exists in the Linux kernel's crypto nx module. It involves improper handling of bounce buffer memory allocation and deallocation. Specifically, bounce buffers are allocated using __get_free_pages() with an order of 2 (which allocates 4 pages), but when freeing these buffers, the code incorrectly uses free_page() instead of free_pages() with the matching order. This mismatch can lead to bounce buffer memory leaks.

Impact Analysis

The impact of this vulnerability is primarily related to memory management within the Linux kernel. Because bounce buffers are not properly freed, this can cause memory leaks, which over time may degrade system performance or stability. In environments with heavy cryptographic operations using the nx module, this could lead to increased memory consumption and potentially system resource exhaustion.

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