Bug 2482141 (CVE-2026-46087)

Summary: CVE-2026-46087 kernel: mm/damon/stat: fix memory leak on damon_start() failure in damon_stat_start()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's Data Access MONitor (DAMON) subsystem. When the `damon_start()` function fails during the `damon_stat_start()` operation, the system does not properly release the allocated memory context. This oversight leads to a memory leak, where previously allocated memory becomes permanently unreachable. Over time, this can result in resource exhaustion, potentially impacting system stability and performance.
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Description OSIDB Bzimport 2026-05-27 15:13:16 UTC 
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.
Comment 1 Keith Grant 2026-05-27 17:11:10 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052702-CVE-2026-46087-c7c2@gregkh/T