CVE-2026-46042
Awaiting Analysis
Awaiting Analysis - Queue
BaseFortify
Publication date: 2026-05-27
Last updated on: 2026-05-27
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
mm/mempolicy: fix memory leaks in weighted_interleave_auto_store()
weighted_interleave_auto_store() fetches old_wi_state inside the if
(!input) block only. This causes two memory leaks:
1. When a user writes "false" and the current mode is already manual,
the function returns early without freeing the freshly allocated
new_wi_state.
2. When a user writes "true", old_wi_state stays NULL because the
fetch is skipped entirely. The old state is then overwritten by
rcu_assign_pointer() but never freed, since the cleanup path is
gated on old_wi_state being non-NULL. A user can trigger this
repeatedly by writing "1" in a loop.
Fix both leaks by moving the old_wi_state fetch before the input check,
making it unconditional. This also allows a unified early return for both
"true" and "false" when the requested mode matches the current mode.
Reviewed by: Donet Tom <[email protected]>
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70