CVE-2026-46087
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Memory Leak in Linux Kernel DAMON

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: mm/damon/stat: fix memory leak on damon_start() failure in damon_stat_start() Destroy the DAMON context and reset the global pointer when damon_start() fails. Otherwise, the context allocated by damon_stat_build_ctx() is leaked, and the stale damon_stat_context pointer will be overwritten on the next enable attempt, making the old allocation permanently unreachable.
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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-2026-46087
EUVD
EUVD-2026-32470
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability occurs in the Linux kernel's DAMON subsystem, specifically in the damon_stat_start() function. When damon_start() fails, the allocated DAMON context is not properly destroyed, causing a memory leak. Additionally, the global pointer to the DAMON context remains stale and can be overwritten on subsequent enable attempts, making the previously allocated memory permanently unreachable.

Impact Analysis

The impact of this vulnerability is a memory leak within the Linux kernel. Over time, repeated failures in damon_start() can cause the system to consume more memory unnecessarily, potentially leading to degraded system performance or instability due to exhausted memory resources.

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