vulnerability
Red Hat: CVE-2025-39727: kernel: mm: swap: fix potential buffer overflow in setup_clusters() (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:L/Au:S/C:C/I:P/A:C) | Sep 7, 2025 | Jan 27, 2026 | Jan 27, 2026 |
Severity
6
CVSS
(AV:L/AC:L/Au:S/C:C/I:P/A:C)
Published
Sep 7, 2025
Added
Jan 27, 2026
Modified
Jan 27, 2026
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 < last_page, setup_clusters() will encounter a buffer
overflow when a badpage is >= maxpages.
Only call inc_cluster_info_page() for badpage which is < maxpages to fix
the issue.
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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