High 7.8Published Sep 7, 2025

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

Updated under an hour ago (Oct 27, 2026, 6:00 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b843786b0bd01ced7fcdbf3b033d68db2f7c61b2 before 91b370800b3f2b3dda244c0ab06719c4971190a5; from b843786b0bd01ced7fcdbf3b033d68db2f7c61b2 before 9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799; from b843786b0bd01ced7fcdbf3b033d68db2f7c61b2 before 815c528b13f2bb9b3130c13bedeabf2351a68129; from b843786b0bd01ced7fcdbf3b033d68db2f7c61b2 before 152c1339dc13ad46f1b136e8693de15980750835	CNA record
linux linux_kernel linux:linux_kernel	from 6.12 before 6.12.42; from 6.13 before 6.15.10; from 6.16 before 6.16.1	NVD

References

References

https://git.kernel.org/stable/c/91b370800b3f2b3dda244c0ab06719c4971190a5	patch
https://git.kernel.org/stable/c/9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799	patch
https://git.kernel.org/stable/c/815c528b13f2bb9b3130c13bedeabf2351a68129	patch
https://git.kernel.org/stable/c/152c1339dc13ad46f1b136e8693de15980750835	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.