CVE-2025-39727 – mm: swap: fix potential buffer overflow in setup_clusters()

CVE ID : CVE-2025-39727

Published : Sept. 7, 2025, 4:15 p.m. | 1 hour, 9 minutes ago

Description : In the Linux kernel, the following vulnerability has been resolved:

mm: swap: fix potential buffer overflow in setup_clusters()

In setup_swap_map(), we only ensure badpages are in range (0, last_page].
As maxpages might be = maxpages.

Only call inc_cluster_info_page() for badpage which is
Severity: 0.0 | NA

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